code: private boolean isBoxingMethod(ExecutableElement method) {
      TypeElement declaringClass = ElementUtil.getDeclaringClass(method);
      // Autoboxing methods.
      if (typeUtil.isBoxedType(declaringClass.asType())) {
        String name = ElementUtil.getName(method);
        TypeMirror returnType = method.getReturnType();
        List<? extends VariableElement> params = method.getParameters();
        if (name.equals("valueOf") && params.size() == 1
            && params.get(0).asType().getKind().isPrimitive()) {
          return true;
        }
        if (params.isEmpty() && returnType.getKind().isPrimitive()
            && name.equals(TypeUtil.getName(returnType) + "Value")) {
          return true;
        }
      }
      return false;
    }
docs: Checks if the given method is a primitive boxing or unboxing method.