class

NotImmutableErr

const class NotImmutableErr : Err

NotImmutableErr indicates using a mutable Obj where an immutable Obj is required. See Obj.isImmutable for the definition of immutability.

 constructors make

Construct with specified error message and optional root cause

 make new make(Str msg := "", Err? cause := null)

Construct with specified error message and optional root cause.

 Haxall 4.0.6 ∙ 21-Jul-2026 09:48 EDT