class_docstr: Class for matrix Lie groups.
code: def __init__(self, representation_dim, lie_algebra=None, **kwargs):
      super().__init__(
          shape=(representation_dim, representation_dim), **kwargs
      )
      self.lie_algebra = lie_algebra
      self.representation_dim = representation_dim
  
imports: import abc
  import geomstats.backend
  from geomstats.geometry.invariant_metric import InvariantMetric
  from geomstats.geometry.manifold import Manifold
  from geomstats.geometry.matrices import Matrices
label_desc: Use image node_id 1 to create a new MatrixLieGroup object from inherited base classes: Manifold, abc with example: obj = MatrixLieGroup(representation_dim, lie_algebra)