Result of `Signature.bind` call. Holds the mapping of arguments
to the function's parameters.
Has the following public attributes:
* arguments : dict
An ordered mutable mapping of parameters' names to arguments' values.
Does not contain arguments' default values.
* signature : Signature
The Signature object that created this instance.
* args : tuple
Tuple of positional arguments values.
* kwargs : dict
Dict of keyword arguments values.