constraintDescription property
A string that explains a constraint when the constraint is violated. For
example, without a constraint description,
a parameter that has an allowed pattern of A-Za-z0-9+ displays the
following error message when the user
specifies an invalid value:
Malformed input-Parameter MyParameter must match pattern A-Za-z0-9+
By adding a constraint description, such as "must contain only uppercase and lowercase letters and numbers," you can display the following customized error message:
Malformed input-Parameter MyParameter must contain only uppercase and lowercase letters and numbers.
Implementation
final String? constraintDescription;