cdm/src/main/java/ucar/nc2/dataset/StructureDS.java
public void enhance(Set<NetcdfDataset.Enhance> mode) {
    for (Variable v : getVariables()) {
      VariableEnhanced ve = (VariableEnhanced) v;
      ve.enhance(mode);
    }
  }
public void enhance(Set<NetcdfDataset.Enhance> mode) {
    for (Variable v : getVariables()) {
      VariableEnhanced ve = (VariableEnhanced) v;
      ve.enhance(mode);
    }
  }
DO NOT USE DIRECTLY. public by accident.
recalc any enhancement info