type io.SectionReader

8 uses

	io (current package)
		io.go#L480: func NewSectionReader(r ReaderAt, off int64, n int64) *SectionReader {
		io.go#L481: 	return &SectionReader{r, off, off, off + n}
		io.go#L486: type SectionReader struct {
		io.go#L493: func (s *SectionReader) Read(p []byte) (n int, err error) {
		io.go#L508: func (s *SectionReader) Seek(offset int64, whence int) (int64, error) {
		io.go#L526: func (s *SectionReader) ReadAt(p []byte, off int64) (n int, err error) {
		io.go#L543: func (s *SectionReader) Size() int64 { return s.limit - s.base }

	mime/multipart
		formdata.go#L177: 	*io.SectionReader