code: def _factor_is_complex(factor):
      if (
          isinstance(factor, COMPLEX_OBJECTS)
          or hasattr(factor, "underlying_metric")
          and isinstance(factor.underlying_metric, COMPLEX_OBJECTS)
      ):
          return True
  
      return False
  
imports: import math
  import geomstats.backend
  import geomstats.errors
  from geomstats.geometry.complex_manifold import ComplexManifold
  from geomstats.geometry.complex_riemannian_metric import ComplexRiemannianMetric
  from geomstats.geometry.manifold import Manifold
  from geomstats.geometry.riemannian_metric import RiemannianMetric
  from geomstats.vectorization import get_batch_shape
label_desc: Use image node_id 1 for calling a global function with example usage: _factor_is_complex(factor) and returns: False, True