Gets the location of the thumbs of this AnnEditDesigner.
AnnEditDesigner.prototype.getThumbLocations = function()
Derived classes should override this property to return the location of the thumbs.
For more information and an example, refer to
Implement User Defined Objects with LEADTOOLS Annotations
Medical Web Viewer .NET
.NET, Java, Android, and iOS/macOS Assemblies
C API/C++ Class Libraries