Unhandled exception: AttributeError: 'ConfigPlugin' object has no attribute 'getCmdlineValue'

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### Step 2: Describe the problem:

#### Steps to reproduce:

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#### Observed Results:

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#### Expected Results:

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Start by reproducing the AttributeError and tracing the ConfigPlugin path that calls getCmdlineValue. The issue provides no environment, reproduction steps, expected behavior, files, or tests, so first determine the affected configuration flow and define completion as the exception no longer occurring in that flow.

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