Problem 45583. Determined if input object array is heterogeneous

Classes inherent from matlab.mixin.Heterogeneous can form arrays of heterogeneous elements, that is elements of different subclasses of the same superclass. Implement a function to determine if incoming vector is heterogeneous, i.e. a mix of more than one classes, or not.

e.g. the following code create a heterogeneous array of objects.

x = [rectangle, line];

so

y == true