code: public static Policy fromJson(String jsonString, PolicyReaderOptions options) {
          return new JsonPolicyReader(options).createPolicyFromJsonString(jsonString);
      }
docs: Returns an AWS access control policy object generated from JSON string. Allows configuring options for the JSON policy
  reader (for example, to disable the stripping of dashes in the principal ID).
  
  @param jsonString
  The JSON string representation of this AWS access control policy.
  @param options
  Configuration for the JSON policy reader that affects the way in which it converts the JSON configuration.
  
  @return An AWS access control policy object.
  
  @throws IllegalArgumentException
  If the specified JSON string is null or invalid and cannot be
  converted to an AWS policy object.