Returns a MEP client for an Out-only operation. This client can be used to
interact with a server which is offering an In-only operation. To use the
client, you must call addMessageContext() with a message context and then
call execute() to execute the client. Note that the execute method's
block parameter is ignored by this client and also the setMessageReceiver
method cannot be used.
Parameters: sc - The service context for this client to live within. Cannot benull. Parameters: options - Options to use as defaults for this client. If any options areset specifically on the client then those override optionshere.