api-el/src/main/java/org/ocpsoft/rewrite/el/El.java
public static El properties(final String submit, final String retrieve)
   {
      return new ElProperties(new ConstantExpression(submit),
               new ConstantExpression(retrieve));
   }
public static El properties(final String submit, final String retrieve)
   {
      return new ElProperties(new ConstantExpression(submit),
               new ConstantExpression(retrieve));
   }
Create a new EL Value binding using a single expression to submit and retrieve values. The specified property must
either be public, or have a publicly defined getter/setter.