It's called lower bound approximation.

In this case, I'd call it out-of-bounds :)

And I also idealized by avoiding any inheritance.

Within-bounds. Not all classes use inheritance.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
RIP an inspiration; A true Folk's Guy

In reply to Re^9: Error handling in chained method calls by BrowserUk
in thread Error handling in chained method calls by szabgab

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