public boolean isInline(Vertex v) {
    for (List<Connection> list : inlineMap.values()) {
      for (Connection connection : list) {
        if (connection.from.equals(v)) {
          return true;
        }
      }
    }
    return false;
  }
@param indentFlag
@param tail
         help to generate correct indent with a specific tail
@return
common/src/java/org/apache/hadoop/hive/common/jsonexplain/DagJsonParser.java