Snapshot type

Signature:

export type Snapshot<TOutput> = {
    status: 'active';
    output: undefined;
    error: undefined;
} | {
    status: 'done';
    output: TOutput;
    error: undefined;
} | {
    status: 'error';
    output: undefined;
    error: unknown;
} | {
    status: 'stopped';
    output: undefined;
    error: undefined;
};