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;		buttonComposite.setLayout(gl);		fUpButton= createButton(buttonComposite, RefactoringMessages.getString("ModifyParametersInputPage.move_op"), true); //$NON-NLS-1$		fDownButton= createButton(buttonComposite, RefactoringMessages.getString("ModifyParametersInputPage.move_down"), false); //$NON-NLS-1$				updateButtonsEnabledState();	}