# Functions
NewMinMaxAllocator return a new allocator or error based on provided min/max value.
# Variables
ErrConflict returned when value is already in use.
ErrInternal returned when no free item found, but a.free != 0.
ErrInvalidRange returned invalid range, for eg# min > max.
ErrOutOfRange returned when value is not in pool range.
ErrRangeFull returned when no more free values in the pool.
# Structs
MinMaxAllocator defines allocator struct.
# Interfaces
Rangeable is an Interface that can adjust its min/max range.