code: def _set_matrix(self, obj, value, shape):
      # Expand 1-dimensional array if possible
      if (
          value.ndim == 1
          and shape[0] == 1
          and value.shape[0] == shape[1]
      ):
          value = value[None, :]
  
      # Enforce that the matrix is appropriate size
      validate_matrix_shape(
          self.name, value.shape, shape[0], shape[1], obj.nobs
      )
  
      # Expand time-invariant matrix
      if value.ndim == 2:
          value = np.array(value[:, :, None], order="F")
  
      return value
  
imports: import warnings
  import numpy
  from .tools import find_best_blas_type, validate_matrix_shape, validate_vector_shape
  from .initialization import Initialization
  from .None import tools
label_desc: Use image node_id 4 for calling the MatrixWrapper obj's underlying member method code with example usage: obj._set_matrix(obj, value, shape) and returns: value