code: public static Value groovyEvaluateConvert(ExecutionContext context, String expression) {
          Object obj = groovyEvaluate(context, expression);
          return Utils.convertFromJava(obj);
      }
docs: Evaluates an expression using Groovy, converting the final value.
  
  @param context The EC
  @param expression The expression to evaluate
  @return The value converted