added persistent bottom sheet

+#Mon Sep 14 00:47:46 IST 2020
+gradle.version=5.6.2

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
+android.enableR8=true

@@ -44,6 +44,23 @@ class HomeView extends GetView<HomeController> {
                       fontSize: 30,
                     ),
                   ),
+                  RaisedButton(
+                    child: Text("data"),
+                    onPressed: (){
+                    Get.bottomSheet(
+                      BottomSheet(
+                        onClosing: (){},
+                        backgroundColor: Colors.amber,
+                        builder: (context) {
+                          return Container(
+                            height: 50,
+                            color: Colors.amber,
+                          );
+                        },
+                      ),
+                      persistent: false
+                    );
+                  }),
                   Text(
                     '${controller.cases.value.global.totalConfirmed}',
                     style: TextStyle(fontSize: 45, fontWeight: FontWeight.bold),

@@ -6,6 +6,7 @@ class GetModalBottomSheetRoute<T> extends PopupRoute<T> {
     this.theme,
     this.barrierLabel,
     this.backgroundColor,
+    this.isPersistent,
     this.elevation,
     this.shape,
     this.removeTop = true,
@@ -20,7 +21,7 @@ class GetModalBottomSheetRoute<T> extends PopupRoute<T> {
         assert(isDismissible != null),
         assert(enableDrag != null),
         super(settings: settings);
-
+  final bool isPersistent;
   final WidgetBuilder builder;
   final ThemeData theme;
   final bool isScrollControlled;
@@ -79,6 +80,7 @@ class GetModalBottomSheetRoute<T> extends PopupRoute<T> {
           elevation:
               elevation ?? sheetTheme?.modalElevation ?? sheetTheme?.elevation,
           shape: shape,
+
           clipBehavior: clipBehavior,
           isScrollControlled: isScrollControlled,
           enableDrag: enableDrag,
@@ -100,10 +102,11 @@ class _GetModalBottomSheet<T> extends StatefulWidget {
     this.clipBehavior,
     this.isScrollControlled = false,
     this.enableDrag = true,
+    this.isPersistent = false,
   })  : assert(isScrollControlled != null),
         assert(enableDrag != null),
         super(key: key);
-
+  final bool isPersistent;
   final GetModalBottomSheetRoute<T> route;
   final bool isScrollControlled;
   final Color backgroundColor;
@@ -151,7 +154,7 @@ class _GetModalBottomSheetState<T> extends State<_GetModalBottomSheet<T>> {
             child: CustomSingleChildLayout(
               delegate: _GetModalBottomSheetLayout(
                   animationValue, widget.isScrollControlled),
-              child: BottomSheet(
+              child: widget.isPersistent == false ? BottomSheet(
                 animationController: widget.route._animationController,
                 onClosing: () {
                   if (widget.route.isCurrent) {
@@ -164,7 +167,22 @@ class _GetModalBottomSheetState<T> extends State<_GetModalBottomSheet<T>> {
                 shape: widget.shape,
                 clipBehavior: widget.clipBehavior,
                 enableDrag: widget.enableDrag,
+              ) : Scaffold(
+                bottomSheet: BottomSheet(
+                animationController: widget.route._animationController,
+                onClosing: () {
+                  // if (widget.route.isCurrent) {
+                  //   Navigator.pop(context);
+                  // }
+                },
+                builder: widget.route.builder,
+                backgroundColor: widget.backgroundColor,
+                elevation: widget.elevation,
+                shape: widget.shape,
+                clipBehavior: widget.clipBehavior,
+                enableDrag: widget.enableDrag,
                 ),
+              ) 
             ),
           ),
         );
@@ -177,6 +195,7 @@ class _GetPerModalBottomSheet<T> extends StatefulWidget {
   const _GetPerModalBottomSheet({
     Key key,
     this.route,
+    this.isPersistent,
     this.backgroundColor,
     this.elevation,
     this.shape,
@@ -186,7 +205,7 @@ class _GetPerModalBottomSheet<T> extends StatefulWidget {
   })  : assert(isScrollControlled != null),
         assert(enableDrag != null),
         super(key: key);
-
+  final bool isPersistent;
   final GetModalBottomSheetRoute<T> route;
   final bool isScrollControlled;
   final Color backgroundColor;
@@ -238,10 +257,26 @@ class _GetPerModalBottomSheetState<T>
             child: CustomSingleChildLayout(
               delegate: _GetModalBottomSheetLayout(
                   animationValue, widget.isScrollControlled),
-              child: BottomSheet(
+             child: widget.isPersistent == false ? BottomSheet(
+                animationController: widget.route._animationController,
+                onClosing: () {
+                  if (widget.route.isCurrent) {
+                    Navigator.pop(context);
+                  }
+                },
+                builder: widget.route.builder,
+                backgroundColor: widget.backgroundColor,
+                elevation: widget.elevation,
+                shape: widget.shape,
+                clipBehavior: widget.clipBehavior,
+                enableDrag: widget.enableDrag,
+              ) : Scaffold(
+                bottomSheet: BottomSheet(
                 animationController: widget.route._animationController,
                 onClosing: () {
-                  if (widget.route.isCurrent) {}
+                  // if (widget.route.isCurrent) {
+                  //   Navigator.pop(context);
+                  // }
                 },
                 builder: widget.route.builder,
                 backgroundColor: widget.backgroundColor,
@@ -250,6 +285,7 @@ class _GetPerModalBottomSheetState<T>
                 clipBehavior: widget.clipBehavior,
                 enableDrag: widget.enableDrag,
                 ),
+              )
             ),
           ),
         );

@@ -627,6 +627,7 @@ extension GetNavigation on GetInterface {
     Widget bottomsheet, {
     Color backgroundColor,
     double elevation,
+    bool persistent = true,
     ShapeBorder shape,
     Clip clipBehavior,
     Color barrierColor,
@@ -637,6 +638,7 @@ extension GetNavigation on GetInterface {
     bool enableDrag = true,
   }) {
     assert(bottomsheet != null);
+    assert(persistent != null);
     assert(isScrollControlled != null);
     assert(useRootNavigator != null);
     assert(isDismissible != null);
@@ -645,6 +647,7 @@ extension GetNavigation on GetInterface {
     return Navigator.of(overlayContext, rootNavigator: useRootNavigator)
         .push(GetModalBottomSheetRoute<T>(
       builder: (_) => bottomsheet,
+      isPersistent: persistent,
       theme: Theme.of(key.currentContext, shadowThemeOnly: true),
       isScrollControlled: isScrollControlled,
       barrierLabel: