cdm/src/main/java/ucar/nc2/NetcdfFile.java
protected String makeFullNameWithString(Group parent, String name) {
    name = makeValidPathName(name); // escape for use in full name  
    StringBuilder sbuff = new StringBuilder();
    appendGroupName(sbuff, parent, null);
    sbuff.append(name);
    return sbuff.toString();
  }
protected String makeFullNameWithString(Group parent, String name) {
    name = makeValidPathName(name); // escape for use in full name  
    StringBuilder sbuff = new StringBuilder();
    appendGroupName(sbuff, parent, null);
    sbuff.append(name);
    return sbuff.toString();
  }
Create a synthetic full name from a group plus a string

@param parent parent group
@param name   synthetic name string
@return synthetic name