Sealed g.f. method
Removes all keys from a table and leaves it empty.
common-extensions
table-extensions
remove-all-keys! table => table
<table>.
<table>.
Modifies table by removing all its keys and elements, and leaves it empty.
This method does not use remove-key!.
Note: To empty collections that are not instances of <mutable-explicit-key-collection>, use size-setter.