public static Boolean isSupported(ClassLoader classLoader) {
        if (isJavaxEL == null) {
            try {
                isJavaxEL = newInstance(classLoader) != null;

                LOG.info("jakarta.el support is {}", isJavaxEL);
            } catch (IllegalStateException ex) {
                LOG.info("jakarta.el is not supported; {}", ex.getMessage());

                isJavaxEL = false;
            }
        }

        return isJavaxEL;
    }
Checks whether jakarta.el is on the classpath and a {@link ExpressionFactory} can be constructed

@param classLoader class loader to resolve {@link ExpressionFactory}
@return if jakarta.el can be used
core/src/main/java/com/github/dozermapper/core/el/ELExpressionFactory.java