code: public CMAArray<CMAUiExtension> fetchAll(String spaceId, String environmentId) {
      return fetchAll(spaceId, environmentId, null);
    }
docs: Fetch ui extensions from a given space.
  {@link CMAClient.Builder#setSpaceId(String)} and will ignore
  {@link CMAClient.Builder#setEnvironmentId(String)}.
  
  @param spaceId       the id of the space this is valid on.
  @param environmentId the id of the environment this is valid on.
  @return all the ui extensions for a specific space.
  @throws IllegalArgumentException if spaceId is null.
  @throws IllegalArgumentException if environmentId is null.