class_docstr: Class for the space of complex matrices (m, n).
  
  Parameters
  ----------
  m, n : int
      Integers representing the shapes of the matrices: m x n.
docstr: Check if point belongs to the Matrices space.
  
  Parameters
  ----------
  point : array-like, shape=[..., m, n]
      Point to be checked.
  atol : float
      Unused here.
  
  Returns
  -------
  belongs : array-like, shape=[...,]
      Boolean evaluating if point belongs to the Matrices space.
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code: def belongs(self, point, atol=gs.atol):
      """Check if point belongs to the Matrices space.
  
      Parameters
      ----------
      point : array-like, shape=[..., m, n]
          Point to be checked.
      atol : float
          Unused here.
  
      Returns
      -------
      belongs : array-like, shape=[...,]
          Boolean evaluating if point belongs to the Matrices space.
      """
      is_matrix = super().belongs(point, atol=atol)
      belongs = gs.logical_and(is_matrix, gs.is_complex(point))
      return belongs
  
imports: import geomstats.backend
  import geomstats.errors
  from geomstats.geometry.base import ComplexMatrixVectorSpace
  from geomstats.geometry.hermitian import HermitianMetric
  from geomstats.geometry.matrices import Matrices
  from geomstats.vectorization import repeat_out
label_desc: Use image node_id 3 for calling the ComplexMatrices obj's underlying member method code with example usage: obj.belongs(point, atol) and returns: belongs