Set content of given textarea element `el` to `value`.

        Args:
            el (obj): Reference to textarea element you wish to set.
            value (obj/list): Value to which the `el` will be set.

def _set_textarea(el, value):
        """
        Set content of given textarea element `el` to `value`.

        Args:
            el (obj): Reference to textarea element you wish to set.
            value (obj/list): Value to which the `el` will be set.
        """
        if isinstance(value, dict):
            el.text = value["val"]
        elif type(value) in [list, tuple]:
            el.text = "\n\n".join(
                "-- %s --\n%s" % (item["source"], item["val"])
                for item in value
            )
        else:
            el.text = value