Default comment field value on transition scree.groovy

import groovy.transform.BaseScript
import com.onresolve.jira.groovy.user.FieldBehaviours

@BaseScript FieldBehaviours fieldBehaviours

final String screenName = 'Resolution screen'
//final String targetTransition = 'Accept'


def comment = getFieldById("comment")

def defaultValue = """_Describe any changes this new feature/improvement brings to the customer experience and/or their existing applications. These can be changes to:_
 * _reference objects (deleted, changed, or new GUCs, system views, system tables)_
 * _command syntax (new, changed, or removed command flags)_
 * _workflow changes_""".replaceAll(/    /, '')

if (fieldScreen.name == screenName && getActionName() == "Done"){
    if (!comment.formValue){
     comment.setRequired(true)   
    comment.setFormValue(defaultValue)
    }

}