class_docstr: Visitor that runs the validation rule when it visits a metric.
class_docstr_tok: ["Visitor","that","runs","the","validation","rule","when","it","visits","a","metric","."]
code: def _default_handler(
      self, node: GroupByItemResolutionNode
  ) -> MetricFlowQueryResolutionIssueSet:
      with self._path_from_start_node_tracker.track_node_visit(node):
          return MetricFlowQueryResolutionIssueSet.merge_iterable(
              parent_node.accept(self)
              for parent_node in node.parent_nodes
          )
  
imports: from __future__ import annotations
  from typing import Sequence
  from typing_extensions import override
  from metricflow.model.semantic_manifest_lookup import SemanticManifestLookup
  from metricflow.query.group_by_item.candidate_push_down.push_down_visitor import DagTraversalPathTracker
  from metricflow.query.group_by_item.resolution_dag.dag import GroupByItemResolutionDag
  from metricflow.query.group_by_item.resolution_dag.resolution_nodes.base_node import GroupByItemResolutionNode, GroupByItemResolutionNodeVisitor
  from metricflow.query.group_by_item.resolution_dag.resolution_nodes.measure_source_node import MeasureGroupByItemSourceNode
  from metricflow.query.group_by_item.resolution_dag.resolution_nodes.metric_resolution_node import MetricGroupByItemResolutionNode
  from metricflow.query.group_by_item.resolution_dag.resolution_nodes.no_metrics_query_source_node import NoMetricsGroupByItemSourceNode
  from metricflow.query.group_by_item.resolution_dag.resolution_nodes.query_resolution_node import QueryGroupByItemResolutionNode
  from metricflow.query.issues.issues_base import MetricFlowQueryResolutionIssueSet
  from metricflow.query.resolver_inputs.query_resolver_inputs import ResolverInputForQuery
  from metricflow.query.validation_rules.base_validation_rule import PostResolutionQueryValidationRule
  from metricflow.query.validation_rules.duplicate_metric import DuplicateMetricValidationRule
  from metricflow.query.validation_rules.metric_time_requirements import MetricTimeQueryValidationRule
label_desc: Use image node_id 2 for calling the _PostResolutionQueryValidationVisitor obj's underlying member method code with example usage: obj._default_handler(node) and returns: MetricFlowQueryResolutionIssueSet