Hook method that runs before a template gets transformed. In this method, we parse and process Globals section
        from the template (if present).

        :param dict template_dict: SAM template as a dictionary

def on_before_transform_template(self, template_dict):
        """
        Hook method that runs before a template gets transformed. In this method, we parse and process Globals section
        from the template (if present).

        :param dict template_dict: SAM template as a dictionary
        """

        try:
            global_section = Globals(template_dict)
        except InvalidGlobalsSectionException as ex:
            raise InvalidDocumentException([ex])

        # For each resource in template, try and merge with Globals if necessary
        template = SamTemplate(template_dict)
        for logicalId, resource in template.iterate():
            resource.properties = global_section.merge(resource.type, resource.properties)
            template.set(logicalId, resource)

        # Remove the Globals section from template if necessary
        Globals.del_section(template_dict)