Function resource_arn 

pub fn resource_arn(
    region: &str,
    account: &str,
    resource_type: &str,
    tail: &str,
) -> String

Amazon Comprehend resource ARN, arn:aws:comprehend:{region}:{account}:{resource_type}/{tail}.

resource_type is one of the type names the live service uses (document-classifier, entity-recognizer, document-classifier-endpoint, entity-recognizer-endpoint, flywheel, sentiment-detection-job, …).