In Control flow§
See primary documentation in context for given as a statement
given
can follow a statement to set the topic in the statement it follows.
.say given "foo"; # OUTPUT: «foo» printf "%s %02i.%02i.%i", <Mo Tu We Th Fr Sa Su>[.day-of-week - 1], .day, .month, .year given DateTime.now; # OUTPUT: «Sa 03.06.2016»