tds/src/main/java/thredds/server/opendap/NcSDStructure.java
public boolean read(String datasetName, Object specialO) throws NoSuchVariableException,
    IOException {

    // read the scalar structure into memory
    StructureData sdata = ncVar.readStructure();
    setData( sdata);
    return(false);
  }
public boolean read(String datasetName, Object specialO) throws NoSuchVariableException,
    IOException {

    // read the scalar structure into memory
    StructureData sdata = ncVar.readStructure();
    setData( sdata);
    return(false);
  }
called if its scalar