socket state, socketstate, kPMElementSocketState — Socket states.
socket state: string, choice, default
socket state is a string. If
socket state is omitted, the default
preparing is used.
socket state must be one of the following three constants:
kPMElementSocketState_Preparing. Socket is being prepared.
kPMElementSocketState_Listening. Socket is listening for connections.
kPMElementSocketState_Error. Socket is closed due to an error.