Third argument '$param' missing in validation getErrorMessage

[bytedevzone]

https://github.com/bcit-ci/CodeIgniter4/blob/develop/system/Validation/Validation.php#L245

Missing $param argument in getErrorMessage

Update:
$this->getErrorMessage($rule, $field, $param);

[jim-parry]

The getErrorMessage signature provides a default value for the third parameter...

getErrorMessage(string $rule, string $field, string $param = null)

How is this a problem?

[bytedevzone]

When I add validation rule 'min_length' (set 5) for a filed with name 'name',
return error with message 'The name field must be at least characters in length.'

By passing third argument '$param'
in https://github.com/bcit-ci/CodeIgniter4/blob/develop/system/Validation/Validation.php#L237
message shown 'The name field must be at least 5 characters in length.'