Bug 261164 [CommonNavigator] Add dynamic tracing for DnD
The options were put in, but the tracing was never actually hooked up.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDropAdapter.java
System.out.println("CommonDropAdapter.validateDrop :" + assistants[i].getClass().getName()); 
				
			}
			for (int i = 0; i < assistants.length; i++) {
				try { 
					valid = assistants[i].validateDrop(target,
							theDropOperation, theTransferData); 
				} catch (Throwable t) {
					NavigatorPlugin.logError(0, t.getMessage(), t);
				}
				if (valid != null && valid.isOK()) {
					result = true;
					if (DEBUG) { 
						System.out
								.println("CommonDropAdapter.validateDrop found \""+assistants[i].getClass().getName()+"\" would handle drop.");  
					}					
					break;
				}
			}
		}
		if (DEBUG) {
			System.out
					.println("CommonDropAdapter.validateDrop (returning " + (valid != null ? valid.getSeverity() + ": " + valid.getMessage() : "" + result) + ")"); 
		}
		setScrollExpandEnabled(true);
		return result;
	}
	/*
	 * The visibility of the following methods is raised for downstream clients
	 * (assistants).