Bug 40300 Compiler pref page does not disable unavailable preferences [build path]
I20030716 + plug-in export If I set a parent preference to ignore I'd expect that sub-properties get disabled.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/OptionsConfigurationBlock.java
comboBox.addSelectionListener(getSelectionListener());
		
		Label placeHolder= new Label(parent, SWT.NONE);
		placeHolder.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		
		String currValue= (String)fWorkingValues.get(key);	
		comboBox.select(data.getSelection(currValue));
		
		fComboBoxes.add(comboBox);
	}
	
	protected Text addTextField(Composite parent, String label, String key, int indent, int widthHint) {	
		Label labelControl= new Label(parent, SWT.NONE);
		labelControl.setText(label);
		labelControl.setLayoutData(new GridData());
				
		Text textBox= new Text(parent, SWT.BORDER | SWT.SINGLE);
		textBox.setData(key);
		textBox.setLayoutData(new GridData());
		
		String currValue= (String) fWorkingValues.get(key);	
		textBox.setText(currValue);
		textBox.addModifyListener(getTextModifyListener());
		GridData data= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
		if (widthHint != 0) {
			data.widthHint= widthHint;
		}
		data.horizontalIndent= indent;
		data.horizontalSpan= 2;
		textBox.setLayoutData(data);