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A trivial example: when the instance passed can legitimately be null, and you want to incorporate the (non-trivial) handling of this into the method.

A trivial example: when the instance passed can legitimately be null, and you want to incorporate the (non-trivial) handling of this into the method.

A trivial example: when the instance passed can legitimately be null and you want to incorporate the (non-trivial) handling of this into the method.

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A trivial example: when the instance passed can legitimately be null, and you want to incorporate the (non-trivial) handling of this into the method.