code: public ObjectIdSerializer<?> getObjectId( Object object ) {
          if ( null != mapObjectId ) {
              return mapObjectId.get( object );
          }
          return null;
      }
docs: <p>getObjectId</p>
  
  @param object a {@link java.lang.Object} object.
  
  @return a {@link com.github.nmorel.gwtjackson.client.ser.bean.ObjectIdSerializer} object.