class_docstr: Simple QFunction for testing.
  
  Args:
      env_spec (garage.envs.env_spec.EnvSpec): Environment specification.
      name (str): Name of the q-function, also serves as the variable scope.
docstr: Initialize QFunction.
code: def _initialize(self):
      """Initialize QFunction."""
      obs_ph = tf.compat.v1.placeholder(
          tf.float32, (None,) + self.obs_dim, name="obs"
      )
  
      self._q_val = super().build(obs_ph).outputs
  
file_path: garage/tests/fixtures/q_functions/simple_q_function.py
imports: import tensorflow
  from tests.fixtures.models import SimpleMLPModel
label_desc: Use image node_id 2 for calling the SimpleQFunction obj's underlying member method code with example usage: obj._initialize() without return types