public Builder orNoop() {
      if (method == null) {
        this.method = UnboundMethod.NOOP;
      }
      return this;
    }
If no implementation has been found, adds a NOOP method.

<p>Note: calls to impl will not match after this method is called!

@return this Builder for method chaining
amoro-common/src/main/java/org/apache/amoro/utils/DynMethods.java