/// Failures to borrow a value.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]pubenumBorrowFail{/// Value was not found in the map.
ValueNotFound,/// Requested an immutable borrow, but value was already borrowed mutably.
BorrowConflictImm,/// Requested a mutable borrow, but value was already borrowed.
////// This variant is return whether the value was previously borrowed
/// immutably or mutably.
BorrowConflictMut,}