/**
 * Eventlet supports a minimal typed event pattern.  It is designed to be used as either a standalone object
 * which emits events, or as a member property of a class that emits events.  It should not be used as a superclass
 * for a class which will emit events.
 */
export class Eventlet {
    listeners = new Set();
    emit = (...args) => {
        // Set is specified to iterate in insertion order
        for (const listener of this.listeners) {
            listener(...args);
        }
    };
    add = (listener) => {
        this.listeners.add(listener);
    };
    remove = (listener) => {
        this.listeners.delete(listener);
    };
}
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