The request message for the operation isEnabled(). The response message for the operation isEnabled(). The request message for the operation setEnabled(). The response message for the operation setEnabled(). The request message for the operation setCallee(). The response message for the operation setCallee(). The request message for the operation getCallee(). The response message for the operation getCallee(). The request message for the operation setCallers(). The response message for the operation setCallers(). The request message for the operation getCallers(). The response message for the operation getCallers(). Check if enabled. Set state enabled. Set callee id. Get callee id. Set caller group. Get caller group.