Bug 80429 [Preferences] [Dialogs] FieldEditors should relax requirements to support DialogPages
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/FieldEditorPreferencePage.java
/** 
     * The first invalid field editor, or <code>null</code>
     * if all field editors are valid.
     */
    private FieldEditor invalidFieldEditor = null;
    /**
     * The parent composite for field editors
     */
    private Composite fieldEditorParent;
    /**
     * Creates a new field editor preference page with the given style,
     * an empty title, and no image.
     *
     * @param style either <code>GRID</code> or <code>FLAT</code>
     */
    protected FieldEditorPreferencePage(int style) {
        super();
        this.style = style;
    }
    /**
     * Creates a new field editor preference page with the given title 
     * and style, but no image.
     *
     * @param title the title of this preference page
     * @param style either <code>GRID</code> or <code>FLAT</code>
     */
    protected FieldEditorPreferencePage(String title, int style) {
        super(title);
        this.style = style;
    }