def METHOD_NAME(self):
    """
    Gets the script content from the node. A subclass can override this
    method, if the script needs to be pre-parsed. The result of this call
    will be passed to the Script Engine for execution.
    """
    try:
        return one(self.xpath('.//bpmn:script')).text
    except AssertionError as ae:
        raise ValidationException(
            "Invalid Script Task.  No Script Provided. " + str(ae),
            node=self.node, file_name=self.filename)