code: def test_multi_input_func_dag(shared_ray_instance):
      @ray.remote
      def a(user_input):
          return user_input * 2
  
      @ray.remote
      def b(user_input):
          return user_input + 1
  
      @ray.remote
      def c(x, y):
          return x + y
  
      with InputNode() as dag_input:
          a_ref = a.bind(dag_input)
          b_ref = b.bind(dag_input)
          dag = c.bind(a_ref, b_ref)
  
      # (2*2) + (2*1)
      assert ray.get(dag.execute(2)) == 7
      # (3*2) + (3*1)
      assert ray.get(dag.execute(3)) == 10
  
file_path: ray/python/ray/dag/tests/test_input_node.py
imports: import pytest
  from ray.dag.dag_node import DAGNode
  from ray.dag.input_node import InputNode
  from typing import Any, TypeVar
  import ray
label_desc: Use image node_id 4 for calling a global function with example usage: test_multi_input_func_dag(shared_ray_instance) and returns: unknown, unknown, unknown