code: func newStringField(name, value string, stored Store) *Field {
  	return NewFieldFromString(name, value, map[Store]*FieldType{
  		STORE_YES: STRING_FIELD_TYPE_STORED,
  		STORE_NO:  STRING_FIELD_TYPE_NOT_STORED,
  	}[stored])
  }
docs: /*
  Creates a new field that is indexed but not tokenized: the entire
  String value is indexed as a single token. For example, this might be
  used for a 'country' field or an 'id' field, or any field that you
  intend to use for sorting or access through the field cache.
  */