Module Nullsafe__AssignmentRule
val check : lhs:Nullsafe.Nullability.t -> rhs:Nullsafe.Nullability.t -> (unit, violation) IStdlib.IStd.result
If `null` can leak from a "less strict" type to "more strict" type, this is an Assignment Rule violation.
module ReportableViolation : sig ... end
Violation that needs to be reported to the user.