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I am trying to limit the total number of items that can be selected on the $has_many multiselect form field, the user guide don't seem to provide a way to this. is there parameter for such feature like LIMIT on multi select form field.
$fields['multi_example'] = array('type' => 'multi', 'options' => $options, 'value' => 'a' , 'limit'=> some value);