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/ContentAssistPreference.java
jcp.allowAddingImports(enabled);
		}
	}
	
	private static void changeJavaDocProcessor(ContentAssistant assistant, IPreferenceStore store, String key) {
		JavaDocCompletionProcessor jdcp= getJavaDocProcessor(assistant);
		if (jdcp == null)
			return;
			
		if (AUTOACTIVATION_TRIGGERS_JAVADOC.equals(key)) {
			String triggers= store.getString(AUTOACTIVATION_TRIGGERS_JAVADOC);
			if (triggers != null)
				jdcp.setCompletionProposalAutoActivationCharacters(triggers.toCharArray());
		} else if (CASE_SENSITIVITY.equals(key)) {
			boolean enabled= store.getBoolean(CASE_SENSITIVITY);
			jdcp.restrictProposalsToMatchingCases(enabled);
		} else if (ORDER_PROPOSALS.equals(key)) {
			boolean enable= store.getBoolean(ORDER_PROPOSALS);
			jdcp.orderProposalsAlphabetically(enable);
		}
	}
	
	/**
	 * Changes the configuration of the given content assistant according to the given property
	 * change event and the given preference store.
	 */
	public static void changeConfiguration(ContentAssistant assistant, IPreferenceStore store, PropertyChangeEvent event) {
		
		String p= event.getProperty();