def document_generator() -> Generator[dict[str, Any], None, None]:
    for _ in range(cls.config.document_count):
        # Generate 1000 random fields for data level
        data_fields = {f"field_{i}": cls.random.randint(0, 1000) for i in range(1000)}
        # Generate 1000 random fields for a level
        a_fields = {f"field_{i}": cls.random.randint(0, 1000) for i in range(1000)}
        # Add field "a" with its nested structure
        data_fields["a"] = {
            **a_fields,
            "b": {
                "c": cls.random.randint(0, 100),
                "d": cls.random.randint(0, 100),
                "e": cls.random.randint(0, 100),
            },
        }
        yield {"data": data_fields}

[
    {
        "$project": {
            "_id": 0,
            "c": "$data.a.b.c",
            "d": "$data.a.b.d",
            "e": "$data.a.b.e",
        }
    },
    {"$_internalInhibitOptimization": {}},
    {"$skip": self.config.document_count + 1},
]