<pre class="grammar">
Import declaration          Local name of Sin

import   "lib/math"         math.Sin
import m "lib/math"         m.Sin
import . "lib/math"         Sin
</pre>

<p>
An import declaration declares a dependency relation between
the importing and imported package.
It is illegal for a package to import itself, directly or indirectly,
or to directly import a package without

pkg encoding/asn1, method (ObjectIdentifier) String() string
pkg go/build, type Package struct, MFiles []string
pkg math/big, method (*Int) MarshalText() ([]uint8, error)
pkg math/big, method (*Int) UnmarshalText([]uint8) error
pkg math/big, method (*Rat) MarshalText() ([]uint8, error)
pkg math/big, method (*Rat) UnmarshalText([]uint8) error
pkg net, type Dialer struct, KeepAlive time.Duration
pkg net/http, const StateActive = 1