@awcrotwell/motion/dist/interfaces/mixin_interface.d.ts

Motion allows you to build reactive, real-time frontend UI components in your Amber application using pure Crystal that are reusable, testable & encapsulated. For brevity, we will call them MotionComponents.

export default interface Imixin {
    connected: Function;
    rejected: Function;
    disconnected: Function;
    received: Function;
}