Method erase

src/fl/video/frame_interpolator.h:49–58

    bool has(fl::u32 frameNum) const { return mFrames.has(frameNum); }

    FramePtr erase(fl::u32 frameNum) {
        FramePtr out;
        auto it = mFrames.find(frameNum);
        if (it == mFrames.end()) {
            return out;
        }
        out = it->second;
        mFrames.erase(it);
        return out;
    }

    FramePtr get(fl::u32 frameNum) const {
        auto it = mFrames.find(frameNum);