code: def _reshape(self, x):
      return gs.reshape(x, (x.shape[0], -1))
  
imports: from sklearn.decomposition import PCA
  from sklearn.linear_model import LinearRegression
  import geomstats.backend
label_desc: Use image node_id 3 for calling the WrappedLinearRegression obj's underlying member method code with example usage: obj._reshape(x) and returns: gs