get Map[Symbol.species]
The Map[Symbol.species] accessor property is an unused accessor property specifying how to copy Map objects.
Syntax
Map[Symbol.species]
Return value
The value of the constructor (this) on which get Symbol.species was called. The return value is used to construct copied Map instances.
Description
The Symbol.species accessor property returns the default constructor for Map objects. Subclass constructors may override it to change the constructor assignment.
Note: This property is currently unused by all
Mapmethods.