function getFocusedEditor() {
        var currentEditor = getCurrentFullEditor();
        if (currentEditor) {

            // See if any inlines have focus
            var focusedInline = _getFocusedInlineEditor();
            if (focusedInline) {
                return focusedInline;
            }

            // otherwise, see if full-sized editor has focus
            if (currentEditor.hasFocus()) {
                return currentEditor;
            }
        }

        return null;
    }
Returns the currently focused editor instance (full-sized OR inline editor).
This function is similar to getActiveEditor(), with one main difference: this
function will only return editors that currently have focus, whereas
getActiveEditor() will return the last visible editor that was given focus (but
may not currently have focus because, for example, a dialog with editable text
is open).
@return {?Editor}