Package bio implements common I/O abstractions used within the Go toolchain.
MustClose closes Closer c and calls log.Fatal if it returns a non-nil error.
MustWriter returns a Writer that wraps the provided Writer, except that it calls log.Fatal instead of returning a non-nil error.
Reader implements a seekable buffered io.Reader.
Open returns a Reader for the file named name.
Writer implements a seekable buffered io.Writer.
Create creates the file named name and returns a Writer for that file.