if (fCanChangeParameterNames) fEditButton= createEditButton(buttonComposite);
	private void createButtonComposite(Composite parent) {		Composite buttonComposite= new Composite(parent, SWT.NONE);		buttonComposite.setLayoutData(new GridData(GridData.FILL_VERTICAL));		GridLayout gl= new GridLayout();		gl.marginHeight= 0;		gl.marginWidth= 0;		buttonComposite.setLayout(gl);		fUpButton= createButton(buttonComposite, RefactoringMessages.getString("ChangeParametersControl.buttons.move_up"), true); //$NON-NLS-1$		fDownButton= createButton(buttonComposite, RefactoringMessages.getString("ChangeParametersControl.buttons.move_down"), false); //$NON-NLS-1$		if (fCanChangeParameterNames)			fEditButton= createEditButton(buttonComposite);		if(fCanAddParameters){			fAddButton= createAddButton(buttonComposite);				fRemoveButton= createRemoveButton(buttonComposite);		}			updateButtonsEnabledState();	}