Bug 42655 SourceAttachmentBlock does not use dialog font for all widgets [dialogs] [build path]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
*/
	public IPath getSourceAttachmentPath() {
		if (fFileNameField.getText().length() == 0) {
			return null;
		}
		return new Path(fFileNameField.getText());
	}
	/**
	 * Gets the source attachment root chosen by the user
	 * Returns null to let JCore automatically detect the root.
	 */
	public IPath getSourceAttachmentRootPath() {
		return null;
	}
	
		
	/**
	 * Creates the control
	 */
	public Control createControl(Composite parent) {
		PixelConverter converter= new PixelConverter(parent);
		
		fSWTWidget= parent;
		
		Composite composite= new Composite(parent, SWT.NONE);	
		
		GridLayout layout= new GridLayout();
		layout.marginHeight= 0;
		layout.marginWidth= 0;
		layout.numColumns= 4;