ITemplateResolver that extends
StringTemplateResource instances for template resources.
This template resolvers will consider the
template being resolved as the template itself,
this is, its contents. No external file or resource will be therefore accessed.
This template resolver will consider its resolved templates non-cacheable by default,
given its nature of being used for resolving arbitrary
TemplateMode#HTML template mode will be used by default.
Note this is the default template resolver that
org.thymeleaf.TemplateEngineinstances will use if no other resolvers are configured.