    <h1>Static Semantics: ContainsUndefinedBreakTarget</h1>
    <p>With argument _labelSet_.</p>
    <emu-see-also-para op="ContainsUndefinedBreakTarget"></emu-see-also-para>
    <emu-grammar>
      IterationStatement :
        `for` `(` LeftHandSideExpression `in` Expression `)` Statement
        `for` `(` `var` ForBinding `in` Expression `)` Statement
        `for` `(` ForDeclaration `in` Expression `)` Statement
        `for` `(` LeftHandSideExpression `of` AssignmentExpression `)` Statement
        `for