code: def marshal_nested_with_mask(app):
      with app.test_request_context(
          "/", headers={"X-Fields": "father,children{name}"}
      ):
          return marshal(family(), family_fields)
  
file_path: flask-restplus/tests/benchmarks/bench_marshalling.py
imports: import pytest
  from faker import Faker
  from flask_restplus import marshal, fields
label_desc: Use image node_id 6 for calling a global function with example usage: marshal_nested_with_mask(app) and returns: marshal