mines whether a dynamic property exists at the specified index.
            </td></tr><tr><td><img src="../icons/pubMethod.gif" alt="Public method" title="Public method" /></td><td><a href="M_Microsoft_ClearScript_V8_FastProxy_IV8FastHostDynamicProperties_HasDynamicProperty_1.htm">HasDynamicProperty(String)</a></td><td>
            Determines whether a dynamic property with the specified name exists.
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