code: def Flatten(self):
      # Generate just foo with a "flatten" import of bar.
      flatc(["--cpp", "foo.fbs"])
  
      # Foo should be generated in place and include bar flatten
      assert_file_and_contents(
          "foo_generated.h", '#include "bar_generated.h"'
      )
  
imports: from flatc_test import *
label_desc: Use image node_id 1 for calling the CppTests obj's underlying member method code with example usage: obj.Flatten() without return types