Consider the following pytest fixtures and test:

Consider the following pytest fixtures and test:

import pytest

@pytest.fixture
def base_url():
    return "http://example.com"

@pytest.fixture
def api_endpoint(base_url):
    return f"{base_url}/api"

def test_api(api_endpoint):
    assert api_endpoint == "http://example.com/api"

What is the role of passing base_url as an argument to the api_endpoint fixture?