move the dispatch queue switch for the start completion block for readability

@@ -232,23 +232,19 @@ public class MobileScanner: NSObject, AVCaptureVideoDataOutputSampleBufferDelega
                     device.activeFormat.formatDescription)
                     device.activeFormat.formatDescription)
                 let hasTorch = device.hasTorch
                 let hasTorch = device.hasTorch
                 
                 
-                DispatchQueue.main.async {
-                    completion(
-                        MobileScannerStartParameters(
-                            width: Double(dimensions.height),
-                            height: Double(dimensions.width),
-                            hasTorch: hasTorch,
-                            textureId: self.textureId ?? 0
-                        )
+                completion(
+                    MobileScannerStartParameters(
+                        width: Double(dimensions.height),
+                        height: Double(dimensions.width),
+                        hasTorch: hasTorch,
+                        textureId: self.textureId ?? 0
                     )
                     )
-                }
+                )
                 
                 
                 return
                 return
             }
             }
             
             
-            DispatchQueue.main.async {
-                completion(MobileScannerStartParameters())
-            }
+            completion(MobileScannerStartParameters())
         }
         }
     }
     }
 
 

@@ -121,7 +121,12 @@ public class MobileScannerPlugin: NSObject, FlutterPlugin {
 
 
         do {
         do {
             try mobileScanner.start(barcodeScannerOptions: barcodeOptions, returnImage: returnImage, cameraPosition: position, torch: torch ? .on : .off, detectionSpeed: detectionSpeed) { parameters in
             try mobileScanner.start(barcodeScannerOptions: barcodeOptions, returnImage: returnImage, cameraPosition: position, torch: torch ? .on : .off, detectionSpeed: detectionSpeed) { parameters in
-                result(["textureId": parameters.textureId, "size": ["width": parameters.width, "height": parameters.height], "torchable": parameters.hasTorch])
+                DispatchQueue.main.async {
+                    result([
+                        "textureId": parameters.textureId,
+                        "size": ["width": parameters.width, "height": parameters.height],
+                        "torchable": parameters.hasTorch])
+                }
             }
             }
         } catch MobileScannerError.alreadyStarted {
         } catch MobileScannerError.alreadyStarted {
             result(FlutterError(code: "MobileScanner",
             result(FlutterError(code: "MobileScanner",