code: final Integer getCcsid() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "getCcsid");
  
          Integer value = (Integer) jmo.getPayloadPart().getField(JsPayloadAccess.CCSID_DATA);
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "getCcsid", value);
          return value;
      }
docs: Get the contents of the ccsid field from the payload part.
  d395685
  
  @return Integer The value of the CharacterSetID for the message payload.