content: on run
  
      set x to foo(1)
  
      x's |λ|(5)
  
      foo(3)
  
      x's |λ|(2.3)
  
  end run
  
  -- foo :: Int -> Script
  on foo(sum)
      script
          on |λ|(n)
              set sum to sum + n
          end |λ|
      end script
  end foo
  