ui/src/main/java/ucar/util/prefs/ui/PrefPanel.java
public Object getFieldValue(String name) {
    Field fld = getField(name);
    if (fld == null) throw new IllegalArgumentException("no field named "+name);
    return fld.getValue();
  }
public Object getFieldValue(String name) {
    Field fld = getField(name);
    if (fld == null) throw new IllegalArgumentException("no field named "+name);
    return fld.getValue();
  }
Get current value of the named field
@param name of field
@return value of named field