Returns whether the object is parameterized with any Symbols.

Used in the notebooks

Used in the tutorials

A value is parameterized when it has an _is_parameterized_ method and that method returns a truthy value, or if the value is an instance of sympy.Basic.

True if the gate has any unresolved Symbols and False otherwise. If no implementation of the magic method above exists or if that method returns NotImplemented, this will default to False.