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key
Combined from primary sources listed below.

In Pair§

See primary documentation in context for method key. 

multi method key(Pair:D:)

Returns the key part of the Pair.

my $p = (Raku => "d");
say $p.key; # OUTPUT: «Raku␤»

In role Enumeration§

See primary documentation in context for method key.

An Enumeration property.

enum Norse-gods <Þor Oðin Freija>;
say Freija.key; # OUTPUT: «Freija␤»

In X::Syntax::NegatedPair§

See primary documentation in context for method key.

Returns the key of the pair that caused the error.