code: def update(self, ng_template_id, name=NotUpdated, plugin_name=NotUpdated,
                 hadoop_version=NotUpdated, flavor_id=NotUpdated,
                 description=NotUpdated, volumes_per_node=NotUpdated,
                 volumes_size=NotUpdated, node_processes=NotUpdated,
                 node_configs=NotUpdated, floating_ip_pool=NotUpdated,
                 security_groups=NotUpdated, auto_security_group=NotUpdated,
                 availability_zone=NotUpdated,
                 volumes_availability_zone=NotUpdated, volume_type=NotUpdated,
                 image_id=NotUpdated, is_proxy_gateway=NotUpdated,
                 volume_local_to_instance=NotUpdated, use_autoconfig=NotUpdated,
                 shares=NotUpdated, is_public=NotUpdated,
                 is_protected=NotUpdated, volume_mount_prefix=NotUpdated):
          
  
          data = {}
          self._copy_if_updated(
              data, name=name, plugin_name=plugin_name,
              hadoop_version=hadoop_version, flavor_id=flavor_id,
              description=description, volumes_per_node=volumes_per_node,
              volumes_size=volumes_size, node_processes=node_processes,
              node_configs=node_configs, floating_ip_pool=floating_ip_pool,
              security_groups=security_groups,
              auto_security_group=auto_security_group,
              availability_zone=availability_zone,
              volumes_availability_zone=volumes_availability_zone,
              volume_type=volume_type, image_id=image_id,
              is_proxy_gateway=is_proxy_gateway,
              volume_local_to_instance=volume_local_to_instance,
              use_autoconfig=use_autoconfig, shares=shares,
              is_public=is_public, is_protected=is_protected,
              volume_mount_prefix=volume_mount_prefix
          )
  
          return self._update('/node-group-templates/%s' % ng_template_id, data,
                              'node_group_template')
docs: Update a Node Group Template.