# Functions
NewLocalLoader creates LocalLoader instance.
NewLocalSaver creates LocalSaver instance.
NewOldDirProvider creates OldDirProvider instances.
# Structs
LocalLoader loads file on local disk.
LocalSaver saves file on local disk.
OldDirProvider returns old directories to remove from a system.
# Interfaces
WriterCloser keeps Writer interface and close function.
# Type aliases
OpenFileFunc declares function to open file by name and return Writer.
OpenFileReadFunc declares function to open file by name and return Reader.