code: public FieldInfo getFieldInfo(String name) {
      if (name != null) {
        if (ignoreCase) {
          name = name.toLowerCase(Locale.US);
        }
        name = name.intern();
      }
      return nameToFieldInfoMap.get(name);
    }
docs: Returns the information for the given {@link FieldInfo#getName()}.
  
  @param name {@link FieldInfo#getName()} or {@code null}
  @return field information or {@code null} for none