question: void visitAndTransform ( TemplateElement [ ] elementBuffer , TemplateTransformModel transform , Map args ) throws TemplateException , IOException { try { Writer tw = transform . getWriter ( out , args ) ; if ( tw == null ) tw = EMPTY_BODY_WRITER ; TransformControl tc = tw instanceof TransformControl ? ( TransformControl ) tw : null ; Writer prevOut = out ; out = tw ; try { if ( tc == null || tc . onStart ( ) != TransformControl . SKIP_BODY ) { do { visit ( elementBuffer ) ; } while ( tc != null && tc . afterBody ( ) == TransformControl . REPEAT_EVALUATION ) ; } } catch ( Throwable t ) { try { if ( tc != null ) { tc . onError ( t ) ; } else { throw t ; } } catch ( TemplateException e ) { throw e ; } catch ( IOException e ) { throw e ; } catch ( RuntimeException e ) { throw e ; } catch ( Error e ) { throw e ; } catch ( Throwable e ) { throw new UndeclaredThrowableException ( e ) ; } } finally { out = prevOut ; tw . close ( ) ; } } catch ( TemplateException te ) { handleTemplateException ( te ) ; } }
target:  "Visit" the template element, passing the output through a TemplateTransformModel