code: public boolean hasAllMandatoryParameters() {
          if (this.f_Parameters.get(_INDEX_F_MessageType) == null
                  || this.f_Parameters.get(_INDEX_F_MessageType).getCode() != this.getMessageType().getCode()) {
              return false;
          }
  
          return true;
      }
docs: /*
  (non-Javadoc)
  
  @see org.mobicents.isup.messages.ISUPMessage#hasAllMandatoryParameters()