<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def wavefunction(self, quil_program):
 """ Simulate a Quil program and get the wavefunction back. :note: If the execution of ``quil_program`` is **non-deterministic**, i.e., if it includes measurements and/or noisy quantum gates, then the final wavefunction from which the returned bitstrings are sampled itself only represents a stochastically generated sample and the wavefunctions returned by *different* ``wavefunction`` calls *will generally be different*. :param Program quil_program: A Quil program. :return: A Wavefunction object representing the state of the QVM. :rtype: Wavefunction """

        # Developer note: This code is for backwards compatibility. It can't be replaced with
        # ForestConnection._wavefunction because we've turned off the ability to set
        # `needs_compilation` (that usually indicates the user is doing something iffy like
        # using a noise model with this function)

        payload = self._wavefunction_payload(quil_program)
        response = post_json(self.session, self.sync_endpoint + "/qvm", payload)
        return Wavefunction.from_bit_packed_string(response.content)