GH-64628
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Validate extension JSON: Error: Field 'classes/EditorResourcePreviewGenerator/methods/_generate/arguments': size changed value in new API, from 2 to 3.
Validate extension JSON: Error: Field 'classes/EditorResourcePreviewGenerator/methods/_generate_from_path/arguments': size changed value in new API, from 2 to 3.

Added parameters to virtual method.
