type io.ReaderAt

6 uses

	io (current package)
		io.go#L230: type ReaderAt interface {
		io.go#L486: func NewSectionReader(r ReaderAt, off int64, n int64) *SectionReader {
		io.go#L502: 	r     ReaderAt // constant after creation
		io.go#L565: func (s *SectionReader) Outer() (r ReaderAt, off int64, n int64) {

	mime/multipart
		formdata.go#L289: 	io.ReaderAt

	testing/iotest
		reader.go#L221: 	if r, ok := r.(io.ReaderAt); ok {