| GStringTemplateEngine | Processes template source files substituting variables and expressions into
 placeholders in a template source text to produce the desired output using
 a streaming approach. | 
| SimpleTemplateEngine | Processes template source files substituting variables and expressions into
 placeholders in a template source text to produce the desired output. | 
| StreamingTemplateEngine | Processes template source files substituting variables and expressions into
 placeholders in a template source text to produce the desired output using a
 closure based approach. | 
| TemplateEngine | Represents an API to any template engine which is basically a factory of Template instances from a given text input. | 
| XmlTemplateEngine | Template engine for use in templating scenarios where both the template
 source and the expected output are intended to be XML. |