code: public boolean isJsonDeserializer( JType type ) {
          return null != type.isClass() && type.isClass().isAssignableTo( jsonDeserializerType );
      }
docs: <p>isJsonDeserializer</p>
  
  @param type a {@link com.google.gwt.core.ext.typeinfo.JType} object.
  @return a boolean.