This method performs additional initializations required for a
SpringTemplateEngine subclass instance. This method
is called before the first execution of
TemplateEngine#process(String,org.thymeleaf.context.IContext)or
TemplateEngine#processThrottled(String,org.thymeleaf.context.IContext)in order to create all the structures required for a quick execution of
templates.
THIS METHOD IS INTERNAL AND SHOULD NEVER BE CALLED DIRECTLY.
The implementation of this method does nothing, and it is designed
for being overridden by subclasses of
SpringTemplateEngine.