# Structs
BoolValue provides a flag value that's aware if it has been set.
DurationValue provides a flag value that's aware if it has been set.
UintValue provides a flag value that's aware if it has been set.
# Type aliases
FuncBoolVar is a type of flag that accepts a function, converts the user's value to a bool, and then calls the given function.
FuncDurationVar is a type of flag that accepts a function, converts the user's value to a duration, and then calls the given function.
FuncOptionalStringVar is a flag that accepts a function which it calls on the optional string given by the user.
FuncVar is a type of flag that accepts a function that is the string given by the user.
StringFlag implements the flag.Value interface and allows multiple calls to the same variable to append a list.