void SetKeyboardFocusable( const v8::FunctionCallbackInfo< v8::Value >& args );
void IsKeyboardFocusable( const v8::FunctionCallbackInfo< v8::Value >& args );
void GetNaturalSize( const v8::FunctionCallbackInfo< v8::Value >& args );
void SetKeyboardFocusable( const v8::FunctionCallbackInfo< v8::Value >& args );
void IsKeyboardFocusable( const v8::FunctionCallbackInfo< v8::Value >& args );
void GetNaturalSize( const v8::FunctionCallbackInfo< v8::Value >& args );