slice.
If the key type is an interface type, these
comparison operators must be defined for the dynamic key values;
failure will cause a <a href="#Run_time_panics">run-time panic</a>.
</p>

<pre>
map[string]int
map[*T]struct{ x, y float64 }
map[string]interface{}
</pre>

<p>
The number of map elements is called its length.

pkg go/build, type Package struct, EmbedPatternPos map[string][]token.Position
pkg go/build, type Package struct, IgnoredOtherFiles []string
pkg go/build, type Package struct, TestEmbedPatterns []string
pkg go/build, type Package struct, TestEmbedPatternPos map[string][]token.Position
pkg go/build, type Package struct, XTestEmbedPatterns []string
pkg go/build, type Package struct, XTestEmbedPatternPos map[string][]token.Position

pkg syscall (windows-amd64), type SysProcAttr struct, ThreadAttributes *SecurityAttributes
pkg testing, func Init()
pkg testing, method (*B) ReportMetric(float64, string)
pkg testing, type BenchmarkResult struct, Extra map[string]float64
pkg text/template, method (ExecError) Unwrap() error
pkg time, method (Duration) Microseconds() int64
pkg time, method (Duration) Milliseconds() int64
pkg unicode, const Version = "11.0.0"