code: def _reshape_y(self, y):
      self._init_shape_y = y.shape
      return self._reshape(y)
  
imports: from sklearn.decomposition import PCA
  from sklearn.linear_model import LinearRegression
  import geomstats.backend
label_desc: Use image node_id 5 for calling the WrappedLinearRegression obj's underlying member method code with example usage: obj._reshape_y(y) and returns: self