Returns the Model editor associated with given file.

        :param file: File to search editors for.
        :type file: unicode
        :return: Editor.
        :rtype: Editor

def get_editor(self, file):
        """
        Returns the Model editor associated with given file.

        :param file: File to search editors for.
        :type file: unicode
        :return: Editor.
        :rtype: Editor
        """

        for editor in self.__model.list_editors():
            if editor.file == file:
                return editor