Cast converts `any` to `Map`.

First returns map's first pair for iteration.

From creates a new ordered map from an iterator.

FromPairs creates an `OrderedMap` from an array of pairs.

Iterate the map in order.

Len returns the length of a container implementing a `Len()` method.

New creates an ordered map generic object.

NewPair instantiates a `Pair` object for use with `FromPairs()`.

SortAlpha sorts the map by keys in alphabetical order.

ToOrderedMap converts a `map` to `OrderedMap`.

Map represents an ordered map where the key must be a comparable type, the ordering is based on insertion order.

Pair represents a key/value pair in an ordered map returned for iteration.