Function isMultiValued

dash/dash-renderer/src/actions/dependencies.js:1076–1078

({id})

 * string IDs do not; wildcard IDs only do if they contain ALL or ALLSMALLER
 */
export function isMultiValued({id}) {
    return typeof id === 'object' && any(v => v.multi, values(id));
}

/*
 * For a given output id and prop, find the callback generating it.