def METHOD_NAME():
    client = boto3.client("kms", region_name="us-east-1")
    key_id = create_key(client)
    for idx in range(0, 3):
        grant_id = client.create_grant(
            KeyId=key_id,
            GranteePrincipal=grantee_principal,
            Operations=["DECRYPT"],
            Name=f"testgrant{idx}",
        )["GrantId"]
    client.retire_grant(KeyId=key_id, GrantId=grant_id)
    assert len(client.list_grants(KeyId=key_id)["Grants"]) == 2