rform syntactic validation of the expression. If in doing so it detects errors, it should raise
 an <code>ELException</code>.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>context</code> - The Jakarta Expression Language context used to parse the expression. The <code>FunctionMapper</code>
 and <code>VariableMapper</code> stored in the ELContext are used to resolve functions and variables found in the
 expression. They can be <code>null</code>, in which case functions or variables are not supporte