Bug 117493 [content assist] CompletionRequestor#completionFailure(IProblem)) is ignored
This got introduced after 3.2 M1 (i.e. broken in 3.2 M2 and newer). If completion fails we now always show: "No completion available." instead of the real error text. Example: for (Iterator i=things.iterator(); i.<ctrl-space> // Iterator not yet imported)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/CompletionProposalCategory.java
* Returns the enablement state of the category.
	 * 
	 * @return the enablement state of the category
	 */
	public boolean isSeparateCommand() {
		return fIsSeparateCommand;
	}
	
	/**
	 * @param included the included
	 */
	public void setIncluded(boolean included) {
		fIsIncluded= included;
	}
	
	/**
	 * @return included
	 */
	public boolean isIncluded() {
		return fIsIncluded;
	}
	public boolean isEnabled() {
		return fIsEnabled;
	}
	public void setEnabled(boolean isEnabled) {
		fIsEnabled= isEnabled;
	}
	/**
	 * Returns <code>true</code> if the category contains any computers, <code>false</code>
	 * otherwise.