doMouseUp method
      
void
doMouseUp()
      
     
    
Call #resize with the final bounds based on the most recent mouse point, commit the transaction, and raise the "PartResized" DiagramEvent. This determines the new bounds by calling #computeResize.
When this calls #computeResize it passes as the reshape argument the result of calling #computeReshape.
Implementation
void doMouseUp() {
  _i4.callMethod(
    this,
    'doMouseUp',
    [],
  );
}