(script
  (expression_statement
    (call_expression
      function: (pipe_variable)
      (arguments)))
  (expression_statement
    (binary_expression
      left: (call_expression
        function: (qualified_identifier
          (identifier))
        (arguments))
      right: (call_expression
        function: (pipe_variable)
        (arguments
          (argument
            (pipe_variable)))))))