go/src/cmd/compile/internal/types2/map.go

type Map …

// NewMap returns a new map for the given key and element types.
func NewMap(key, elem Type) *Map { … }

// Key returns the key type of map m.
func (m *Map) Key() Type { … }

// Elem returns the element type of map m.
func (m *Map) Elem() Type { … }

func (t *Map) Underlying() Type { … }

func (t *Map) String() string   { … }