semantic/test/fixtures/javascript/generator-function.diff+A.txt

{+(Program
  (Function
    (Identifier)
    (Params
      (Other "required_parameter"
        (Identifier))
      (Other "required_parameter"
        (Identifier)))
    (ExpressionStatements
      (Yield))
    (ExpressionStatements
      (Yield
        (Identifier)))))+}