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