ExpressionFactory</code>. This method uses the following ordered lookup procedure
 to determine the <code>ExpressionFactory</code> implementation class to load:

 <ul>
 <li>Use the Services API (as detailed in the JAR specification).</li>
 <li>Use the properties file "lib/el.properties" in the JRE directory. If this file exists and it is readable by the
 <code> java.util.Properties.load(InputStream)</code> method, and it contains an entry whose key is
 "jakarta.el.ExpressionFactory", then the value of that 