function _createFullEditorForDocument(document, pane, editorOptions) {
        // Create editor; make it initially invisible
        var editor = _createEditorForDocument(document, true, pane.$content, undefined, editorOptions);
        editor.setVisible(false);
        pane.addView(editor);
        exports.trigger("_fullEditorCreatedForDocument", document, editor, pane.id);
        return editor;
    }
@private
Creates a new "full-size" (not inline) Editor for the given Document, and sets it as the
Document's master backing editor. The editor is not yet visible;
Semi-private: should only be called within this module or by Document.
@param {!Document} document  Document whose main/full Editor to create
@param {!Pane} pane  Pane in which the editor will be hosted
@param {!Object} editorOptions If specified, contains editor options that
can be passed to CodeMirror
@return {!Editor}