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live
Combined from primary sources listed below.

In Supply§

See primary documentation in context for method live 

method live(Supply:D: --> Bool:D)

Returns True if the supply is "live", that is, values are emitted to taps as soon as they arrive. Always returns True in the default Supply (but for example on the supply returned from Supply.from-list it's False).

say Supplier.new.Supply.live;    # OUTPUT: «True␤»