This project allows to store the arguments for callables.
                                    This abstract base class implements the common features of 
                                    ArgumentHolder 
                                    and 
                                    FrozenArgumentHolder.
                                
This magic method implements len(self).
It returns the sum of the lengths of args and kwargs.
                                    
This magic method implements self @ other.
It returns a copy with other applied to all the values as a callable.
This magic method implements other @ self.
other @ self does the same as self @ other.
This abstract property represents the positional arguments.
This method calls a callback using the arguments in the current instance.
This method makes a copy of the current instance.
This abstract property represents the keyword arguments.
This method creates a functools.partial object.
This method creates a functools.partialmethod object.
This method converts the current instance into a ArgumentHolder object.
This method converts the current instance into a FrozenArgumentHolder object.
This class provides mutable argument holders.
This magic method implements self @= other.
This class provides immutable argument holders.