def get_value_from_content(key):
    """Get a value from the path specifed.

    :param key: Array that defines the path of the value inside the message.
    """
    def value_from_content_function(service, message):
        """Actual implementation of get_value_from_content function.

        :param service: SelenolService object.
        :param message: SelenolMessage request.
        """
        return _get_value(message.content, key)
    return value_from_content_function
Get a value from the path specifed.

    :param key: Array that defines the path of the value inside the message.