public PartialPath transformToExactPath() {
    return isUnderAlignedEntity ? new AlignedPath(this) : this;
  }
if isUnderAlignedEntity is true, return an AlignedPath with only one sub sensor otherwise,
return itself
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/path/MeasurementPath.java