jest-metadata/dist/types/Emitter.d.ts

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export interface ReadonlyEmitter<Event extends {
    type: string;
}> {
    on(type: '*', listener: (event: Event) => unknown): this;
    on<E extends Event>(type: E['type'], listener: (event: E) => unknown): this;
    once(type: '*', listener: (event: Event) => unknown): this;
    once<E extends Event>(type: E['type'], listener: (event: E) => unknown): this;
    off(type: '*', listener: (event: Event) => unknown): this;
    off<E extends Event>(type: E['type'], listener: (event: E) => unknown): this;
}
export interface ReadonlyAsyncEmitter<Event extends {
    type: string;
}> {
    on<E extends Event>(type: E['type'] | '*', listener: (event: E) => void | Promise<void>, weight?: number): this;
    once<E extends Event>(type: E['type'] | '*', listener: (event: E) => void | Promise<void>, weight?: number): this;
    off<E extends Event>(type: E['type'] | '*', listener: (event: E) => void | Promise<void>): this;
}
export interface Emitter<Event extends {
    type: string;
}> extends ReadonlyEmitter<Event> {
    emit(event: Event): void;
}
export interface AsyncEmitter<Event extends {
    type: string;
}> extends ReadonlyAsyncEmitter<Event> {
    emit(event: Event): Promise<void>;
}