code: private String getOverrideSignature(ExecutablePair method) {
      StringBuilder sb = new StringBuilder(ElementUtil.getName(method.element()));
      sb.append('(');
      for (TypeMirror pType : method.type().getParameterTypes()) {
        sb.append(typeUtil.getSignatureName(pType));
      }
      sb.append(')');
      return sb.toString();
    }
docs: otherwise. Used as a key to group inherited methods together.