IsInUse returns a boolean indicating whether the error indicates that a volume is in use.

IsNameConflict returns a boolean indicating whether the error indicates that a volume name is already taken.

IsNotExist returns a boolean indicating whether the error indicates that the volume does not exist.

New initializes a VolumeStore to keep reference counting of volumes in the system.

OpErr is the error type returned by functions in the store package.

VolumeStore is a struct that stores the list of volumes available and keeps track of their usage counts.