Bug 25845 Support for manually attaching source to a class path container
From Dejan: There is a work item on the ability to manually attach source to classpath entries managed by classpath container. We discussed it and we have workable options but we would like if we can have it by M3 because we want to start self-hosting using classpath containers ourselves.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
return null;
		}
		return new Path(fFileNameField.getText());
	}
	/**
	 * Gets the source attachment root chosen by the user
	 */
	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;		
		composite.setLayout(layout);
		
		int widthHint= converter.convertWidthInCharsToPixels(fIsVariableEntry ? 50 : 60);