question: private void write ( String plain , String prefix ) throws Exception { buffer . write ( result ) ; buffer . clear ( ) ; if ( ! isEmpty ( prefix ) ) { result . write ( prefix ) ; result . write ( ':' ) ; } result . write ( plain ) ; }
target:  This is used to write plain text to the output stream without any translation. This is used when writing the start tags and end tags, this is also used to write attribute names.