public static ProcessContext removeSpaceMember(Identity owner, Identity spaceIdentity) {
    //
    SocialServiceContext ctx = SocialServiceContextImpl.getInstance();
    StreamProcessContext processCtx =
        StreamProcessContext.getIntance(
            StreamProcessContext.REMOVE_SPACE_MEMBER_ACTIVITY_PROCESS, ctx);
    processCtx.identity(owner).spaceIdentity(spaceIdentity);

    try {
      // beforeAsync(); //this point can make the problem with ADD_PROPERTY exception
      //
      ctx.getServiceExecutor()
          .execute(StreamProcessorFactory.removeSpaceMemberStream(), processCtx);
    } finally {
      LOG.debug(processCtx.getTraceLog());
    }

    return processCtx;
  }