helperText property
final
Text that provides context about the DropdownMenu's value, such as how the value will be used.
If non-null, the text is displayed below the input field, in the same location as errorText. If a non-null errorText value is specified then the helper text is not shown.
Defaults to null;
See also:
- InputDecoration.helperText, which is the text that provides context about the InputDecorator.child's value.
Implementation
final String? helperText;