<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _ensure_allow_rp(rp_pyxb):
 """Ensure that RP allows replication."""

    if not rp_pyxb.replicationAllowed:
        rp_pyxb.replicationAllowed = True
    if not rp_pyxb.numberReplicas:
        rp_pyxb.numberReplicas = 3