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/ui/PreferencesConstants.java
public static final String OPEN_TYPE_HIERARCHY_IN_VIEW_PART= JavaBasePreferencePage.OPEN_TYPE_HIERARCHY_IN_VIEW_PART;
	
	/**
	 * Selects the behaviour when double clicking in the packages view. String value, DOUBLE_CLICK_GOES_INTO or DOUBLE_CLICK_EXPANDS.
	 */
	public static final String DOUBLE_CLICK= JavaBasePreferencePage.DOUBLE_CLICK;
	/**
	 * String value used by DOUBLE_CLICK.
	 */
	public static final String DOUBLE_CLICK_GOES_INTO= JavaBasePreferencePage.DOUBLE_CLICK_GOES_INTO;
	/**
	 * String value used by DOUBLE_CLICK.
	 */
	public static final String DOUBLE_CLICK_EXPANDS= JavaBasePreferencePage.DOUBLE_CLICK_EXPANDS;
	/**
	 * Enable / Disable showing reconciled elements in viewes. Boolean value.
	 */
	public static final String RECONCILE_JAVA_VIEWS= JavaBasePreferencePage.RECONCILE_JAVA_VIEWS;
	/**
	 * Path of the Javadoc command used by the Javadoc creation wizard. String value.
	 */
	public static final String JAVADOC_COMMAND= JavadocPreferencePage.PREF_JAVADOC_COMMAND;
	/**
	 * Enable / Disable the highlighting of matching brackets. Boolean value.
	 */
	public final static String EDITOR_MATCHING_BRACKETS= CompilationUnitEditor.MATCHING_BRACKETS;
	/**
	 * Color used for highlighting matching brackets. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter