How to Restrict input to max length_

[SpeedyVV]

I have a field for ID number which has 9 digits.

Is there a way to stop user from inputting more numbers after the 9th number is entered?

Thanks

[infolinematrix]

FormBuilderTextField(
maxLength: 9,
decoration: InputDecoration(
labelText: 'ID',
),
keyboardType: TextInputType.number,
)