code: protected boolean isDecomposableBuilder(ClassName t) {
      return t.equals(ClassName.get(DecomposableMatchBuilder0.class))
          || t.equals(ClassName.get(DecomposableMatchBuilder1.class))
          || t.equals(ClassName.get(DecomposableMatchBuilder2.class))
          || t.equals(ClassName.get(DecomposableMatchBuilder3.class));
    }
docs: Returns true if the given {@link ClassName} is a decomposable match builder; false otherwise.