void GetChildRectangle( const v8::FunctionCallbackInfo< v8::Value >& args );
void CreateCroppedBufferImage( const v8::FunctionCallbackInfo< v8::Value >& args );
void GetChildRectangle( const v8::FunctionCallbackInfo< v8::Value >& args );
void CreateCroppedBufferImage( const v8::FunctionCallbackInfo< v8::Value >& args );