code: func NewFieldFromString(name, value string, ft *FieldType) *Field {
  	assert2(name != "", "name cannot be empty")
  	assert2(value != "", "value cannot be empty")
  	assert2(ft.stored || ft.indexed,
  		"it doesn't make sense to have a field that is neither indexed nor stored")
  	return &Field{_type: ft, _name: name, _data: value, _boost: 1}
  }
docs: // Create field with String value