class_docstr: Describes a series of joins between the measure semantic model, and other semantic models by entity.
  
  For example:
  
  (measure_source JOIN dimension_source0 ON entity A) JOIN dimension_source1 ON entity B
  
  would be represented by 2 path elements [(semantic_model0, A), (dimension_source1, B)]
docstr: The last semantic model that would be joined in this path.
docstr_tok: ["The","last","semantic","model","that","would","be","joined","in","this","path","."]
code: def last_semantic_model_reference(self) -> SemanticModelReference:
      """The last semantic model that would be joined in this path."""
      assert len(self.path_elements) > 0
      return self.path_elements[-1].semantic_model_reference
  
imports: from __future__ import annotations
  import logging
  import time
  from collections import defaultdict
  from dataclasses import dataclass
  from typing import Dict, FrozenSet, List, Optional, Sequence, Set, Tuple
  from dbt_semantic_interfaces.enum_extension import assert_values_exhausted
  from dbt_semantic_interfaces.pretty_print import pformat_big_objects
  from dbt_semantic_interfaces.protocols.dimension import Dimension, DimensionType
  from dbt_semantic_interfaces.protocols.semantic_manifest import SemanticManifest
  from dbt_semantic_interfaces.protocols.semantic_model import SemanticModel
  from dbt_semantic_interfaces.references import DimensionReference, MeasureReference, MetricReference, SemanticModelReference, TimeDimensionReference
  from dbt_semantic_interfaces.type_enums import MetricType
  from dbt_semantic_interfaces.type_enums.date_part import DatePart
  from dbt_semantic_interfaces.type_enums.time_granularity import TimeGranularity
  from metricflow.dataset.dataset import DataSet
  from metricflow.errors.errors import UnknownMetricLinkingError
  from metricflow.model.semantics.linkable_element_properties import LinkableElementProperties
  from metricflow.model.semantics.semantic_model_join_evaluator import SemanticModelJoinEvaluator
  from metricflow.model.semantics.semantic_model_lookup import SemanticModelLookup
  from metricflow.protocols.semantics import SemanticModelAccessor
  from metricflow.specs.specs import DEFAULT_TIME_GRANULARITY, DimensionSpec, EntityReference, EntitySpec, LinkableSpecSet, TimeDimensionSpec
label_desc: Use image node_id 2 for calling the SemanticModelJoinPath obj's underlying member method code with example usage: obj.last_semantic_model_reference() and returns: self