CLOSE phaser

doc/Language/phasers.pod6

@@ -44,6 +44,7 @@ Here is a summary:
        QUIT {...} #  catch async exceptions within a whenever-block, runs very last
 
     COMPOSE {...} #  when a role is composed into a class
+    CLOSE   {...} #  appears in a supply block, called when the supply is closed
 
 Phasers marked with a C<*> have a run-time value, and if evaluated earlier than
 their surrounding expression, they simply save their result for use in the
@@ -224,6 +225,10 @@ treated as if declared at C<use> time in the using module. (It is erroneous to
 depend on this order if the module is used more than once, however, since the
 phasers are only installed the first time they're noticed.)
 
+=head2 X<CLOSE|CLOSE (phasers)>
+
+Appears in a supply block. Called when the supply is closed.
+
 =head1 Block Phasers
 
 Execution in the context of a block has its own phases.