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 final static String EDITOR_FOREGROUND_DEFAULT_COLOR= AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT;
	/**
	 * Color used for the text background. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_BACKGROUND_COLOR= AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND;
	/**
	 * Default color used for the text background. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_BACKGROUND_DEFAULT_COLOR= AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT;
	/**
	 * Color used for multi line comments. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_MULTI_LINE_COMMENT_COLOR= IJavaColorConstants.JAVA_MULTI_LINE_COMMENT;
	/**
	 * Enable / Disable the usage of bold style for multi line comments.
	 */
	public final static String EDITOR_MULTI_LINE_COMMENT_BOLD= IJavaColorConstants.JAVA_MULTI_LINE_COMMENT + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for single line comments. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_SINGLE_LINE_COMMENT_COLOR= IJavaColorConstants.JAVA_SINGLE_LINE_COMMENT;
	/**