The identifier <code>f</code> is called the (field or method) <i>selector</i>;
it must not be the <a href="#Blank_identifier">blank identifier</a>.
The type of the selector expression is the type of <code>f</code>.
If <code>x</code> is a package name, see the section on
<a href="#Qualified_identifiers">qualified identifiers</a>.
</p>

<p>
A selector <code>f</code> may denote a field or method <code>f</code> of

pkg syscall (netbsd-arm64-cgo), func RouteRIB(int, int) ([]uint8, error)
pkg syscall (netbsd-arm64-cgo), func Seek(int, int64, int) (int64, error)
pkg syscall (netbsd-arm64-cgo), func Select(int, *FdSet, *FdSet, *FdSet, *Timeval) error
pkg syscall (netbsd-arm64-cgo), func Sendfile(int, int, *int64, int) (int, error)
pkg syscall (netbsd-arm64-cgo), func Sendmsg(int, []uint8, []uint8, Sockaddr, int) error