A simple extension point to allow us to switch between the classic Groovy parser and the new Antlr based parser
| Type Params | Return Type | Name and description | 
|---|---|---|
 | 
                            ModuleNode | 
                            buildAST(SourceUnit sourceUnit, ClassLoader classLoader, Reduction cst) | 
                        
 | 
                            Reduction | 
                            parseCST(SourceUnit sourceUnit, Reader reader) |