def METHOD_NAME():
    """Return the JSON body of a valid Blackboard Files API response."""
    return {
        "results": [
            {
                "id": "_7851_0",
                "modified": "2008-05-06T07:26:35.000z",
                "name": "File_1.pdf",
                "downloadUrl": "https://example.com/file0.pdf",
                "unknown_field": "this_should_be_excluded",
                "mimeType": "application/pdf",
                "type": "File",
            },
            # A folder.
            {
                "id": "_7851_1",
                "modified": "1983-05-26T02:37:23.000z",
                "name": "Folder_1",
                "type": "Folder",
            },
            # A non-PDF file.
            {
                "id": "_7851_2",
                "modified": "1980-05-26T02:37:23.000z",
                "name": "NOT_A_PDF.jpeg",
                "downloadUrl": "https://example.com/NOT_A_PDF.jpeg",
                "mimeType": "image/jpeg",
                "type": "File",
            },
        ]
    }