he variables <code class="api-name">*integer-handler*</code> and <code class="api-name">*boolean-handler*</code>.  Accordingly, the macro form <code>(json:bind-custom-vars (:boolean <var>X</var> :integer <var>Y</var>) <var>Z</var>)</code> expands to <code>(let ((json:*boolean-handler* <var>X</var>) (json:*integer-handler* <var>Y</var>)) <var>Z</var>)</code>.  Descriptions of customization parameters below always specify the corresponding keyword, and descriptions of macro APIs use the parameter name <code c