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</span>BOOST_VMD_IS_PARENS_EMPTY(sequence)</pre></div>
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-<a name="idm46213760265168"></a><h2>Description</h2>
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<p>sequence = a VMD sequence</p>
<p>returns = 1 if the sequence is a set of parens with no data, else returns 0.</p>
<p>A set of parens with no data may be:</p>
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