code: def param(self):
      return gs.vstack([self.intercept, self.coef])
  
file_path: geomstats/geomstats/test_cases/learning/geodesic_regression.py
imports: import pytest
  import geomstats.backend
  from geomstats.test.random import RandomDataGenerator
  from geomstats.test_cases.learning._base import BaseEstimatorTestCase
label_desc: Use image node_id 2 for calling the Model obj's underlying member method code with example usage: obj.param() and returns: gs