Chicken Fricassee with Dumplings

Name: Chicken Fricassee with Dumplings
Ingredients: 4 to 6 pounds chicken parts; 1 large onion (peeled and sliced); 1 cup celery (chopped with leaves); 1 1/2 teaspoons salt (or to taste); 1/8 teaspoon pepper (or to taste); 2 1/3 cups water (divided; plus more to add to cooking liquids); 1/4 cup all-purpose flour; For the Paprika Dumplings:; 2 cups all-purpose flour; 1 tablespoon baking powder; Optional: 2 teaspoons parsley (fresh, minced); 1 teaspoon salt; 1/4 teaspoon paprika; 2 tablespoons shortening; 1 cup milk