https://android.googlesource.com/platform/frameworks/support/+/1890c9b8904ba5d633336bb7f877a8e61591da3b/customview/
customview - platform/frameworks/support - Git at Google
platformframeworkssupportgitgoogle
https://developer.android.com/reference/kotlin/androidx/customview/view/package-summary?authuser=2
androidx.customview.view | API reference | Android Developers
view api referenceandroidxdevelopers
https://www.syncfusion.com/forums/151711/imageeditor-customview-example
ImageEditor - CustomView example | Xamarin.Forms | SfImageEditor | Syncfusion
Forum Thread - SfImageEditor - ImageEditor - CustomView example. Browse other users' questions about our Xamarin.Forms SfImageEditor components.
xamarin formsimageeditorexamplesyncfusion