Method snapshot

src/Frame.ts:22–27

()

  duration(): number { return this.endTime - this.startTime }
  data(endTime: number, startTime?: number): string { return '' }
  snapshot(): string {
    if (this.prev) {
      return this.prev.snapshot()
    }
    return ''
  }
}

export type FrameSnapshotFn = (s: string) => string