Bug 15604 Promote Fill arguments on method completion to a real preference
It is still in work in progress but it has become an established feature by now. Promote the preference to the code assist preference page.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/JavaCompletionProcessor.java
* a fully qualified type name
	 * 
	 * @param restrict <code>true</code> if import can be added
	 */
	public void allowAddingImports(boolean allowAddingImports) {
		fAllowAddImports= allowAddingImports;
	}	
		
	/**
	 * @see IContentAssistProcessor#getErrorMessage()
	 */
	public String getErrorMessage() {
		if (fNumberOfComputedResults == 0)
			return "No completions available.";
		return fCollector.getErrorMessage();
	}
	/**
	 * @see IContentAssistProcessor#getContextInformationValidator()
	 */
	public IContextInformationValidator getContextInformationValidator() {
		if (fValidator == null)
			fValidator= new JavaParameterListValidator();
		return fValidator;
	}
	/**
	 * @see IContentAssistProcessor#getContextInformationAutoActivationCharacters()
	 */
	public char[] getContextInformationAutoActivationCharacters() {
		return null;
	}