protected IFAState tryGetNextState(
      final N node, final IFAState sourceState, final IFATransition transition) {
    if (transition.isMatch(node.getName())) {
      return patternFA.getNextState(sourceState, transition);
    } else {
      return null;
    }
  }
Try to get next matched state from sourceState and add it into currentStateMatchInfo

@param child child node to match
@param sourceState source state
@param currentStateMatchInfo currentStateMatchInfo
@return iterator of rest transitions
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/schema/tree/AbstractTreeVisitor.java