code: @ObjectiveCName("appendArrayGenericType:types:")
      public static void appendArrayGenericType(StringBuilder out, Type[] types) {
          if (types.length == 0) {
              return;
          }
          appendGenericType(out, types[0]);
          for (int i = 1; i < types.length; i++) {
              out.append(',');
              appendGenericType(out, types[i]);
          }
      }
docs: Appends names of the {@code types} to {@code out} separated by commas.