code: private JClassType findClassType( Class<?> clazz ) {
          JClassType mapperType = context.getTypeOracle().findType( clazz.getCanonicalName() );
          if ( null == mapperType ) {
              logger.log( Type.WARN, "Cannot find the type denoted by the class " + clazz.getCanonicalName()
                         + " or GWT compilation of that class failed. In the latter case, compile with -failOnError to discover the real error." );
              return null;
          }
          return mapperType;
      }
docs: @param clazz class to find the type
  
  @return the {@link JClassType} denoted by the class given in parameter