def search_chatter_feeds(object_type, query_string, binding, limit=100)
      return get_all_chatter_feeds_with_attachments(nil, object_type, binding, 'no-attachment-for-search', limit, false, query_string)
    end
def search_chatter_feeds(object_type, query_string, binding, limit=100)
      return get_all_chatter_feeds_with_attachments(nil, object_type, binding, 'no-attachment-for-search', limit, false, query_string)
    end
find all chatter feeds based on object_type, query_string, and given binding