DoWithBackup executes a function with a backup of the subject object.

NewCommand creates a new command with the given execute and undo functions.

NewHistory creates a new history with the given data.

NewVerbose creates a new Verbose struct.

PrintPointer generates a string representation of a pointer at a given distance.

PointerArrow is the arrow used to indicate the current position of the pointer.

Command represents a generic command that can be executed and undone.

History represents a history of commands that can be executed and undone.

Verbose is a struct that can be used to print verbose output.

Backuper is an interface that represents a type that can be backed up and restored.

Commander is an interface that represents a command that can be executed and undone.