Bug 93567 ContextInformationPopup leaks CompletionEngines?
N20050503-0010 Yourkit memory snapshot N20050503-0010_1.5.0_20050503-1905.memory on my machine.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/ProposalContextInformation.java
private final CompletionProposal fProposal;
	
	private CompletionProposalLabelProvider fLabelProvider;
	private String fContextDisplayString;
	private String fInformationDisplayString;
	private Image fImage;
	/**
	 * Creates a new context information.
	 */