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fold

switch.fold

(C 
type
, fa Unary C A, fb Unary C B)
 => 
C
fold this choice to new type `C`.

this is useful when you don't want to break
fluent-style code.

example:

Type Parameters

0.095dev (GIT hash 6fe4713e6f0ffc9fa21235ced6756ebe4d5da1fe)
last changed: 2026-05-22