Validates a field which should contain alphanumeric content.
Validates a field which should contain an email address.
Returns the group for the field.
Returns the ID of a field.
Returns the label text of a field.
Returns the field’s tooltip.
Returns the field’s type hint.
Returns whether the field is currently filled.
Returns whether or not a field is required.
Checks, if field is editable.
Checks, if specified field is valid.
Returns whether or not a field is visible.
Sets the label text of a field.
Sets whether or not a field is required.
Sets the tooltip for the field.
Sets the type hint for the field.
Set an additional validator for a field.
Sets whether or not a field is visible.