code: public CMAArray<CMAEnvironment> fetchAll(String spaceId) {
      assertNotNull(spaceId, "spaceId");
      return service.fetchAll(spaceId).blockingFirst();
    }
docs: Fetch all environments of the given space.
  <p>
  This method will override the configuration specified through
  {@link CMAClient.Builder#setSpaceId(String)}.
  
  @param spaceId space ID
  @return {@link CMAArray} result instance
  @throws IllegalArgumentException if environment's space id is null.