OrderedMap.update

Undocumented in source. Be warned that the author may not have intended to support it.
struct OrderedMap(K, V)
void
update
(
C
U
)
(
auto ref K key
,
scope C create
,
scope U update
)
if (
is(typeof(create()) : V) &&
is(typeof(update(*(V*).init)) : V)
)

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