code: public CMAArray<CMARole> fetchAll(String spaceId) {
      assertNotNull(spaceId, "spaceId");
      return service.fetchAll(spaceId).blockingFirst();
    }
docs: Fetch all roles of this space.
  <p>
  This method will override the configuration specified through
  {@link CMAClient.Builder#setSpaceId(String)} and will ignore
  {@link CMAClient.Builder#setEnvironmentId(String)}.
  
  @param spaceId the space identifier identifying the space.
  @return the array of roles.
  @throws IllegalArgumentException if spaceId is null.