Enhance calls support

We need to enhance the spies/ mocks calls validation support. Right now we only know the last parameters. We want a more hands on validation based call number or other ideas.

Start by locating the spies and mocks call-validation implementation and the existing handling of last parameters. Define the desired call-number or alternative validation behavior before changing it, then verify that the completed support is covered by the project's tests.

Written by the indexing model from the issue text.