allocator

var (
	// ErrNotFound the number was never allocated
	ErrNotFound = errors.New("number not allocated")
	// ErrConflict the number was already allocated
	ErrConflict = errors.New("number already allocated")
	// ErrInvalidRange the range is invalid
	ErrInvalidRange = errors.New("invalid range")
	// ErrOutOfRange the number is out of range
	ErrOutOfRange = errors.New("out of range")
	// ErrRangeFull the range is full
	ErrRangeFull = errors.New("range full")
	// ErrInternal something is wrong internally
	ErrInternal = errors.New("internal error")
)