question: @ Override public final String toString ( ) { StringBuilder buffer = new StringBuilder ( ) ; buffer . append ( "Document<" ) ; for ( int i = 0 ; i < fields . size ( ) ; i ++ ) { IndexableField field = fields . get ( i ) ; buffer . append ( field . toString ( ) ) ; if ( i != fields . size ( ) - 1 ) { buffer . append ( " " ) ; } } buffer . append ( ">" ) ; return buffer . toString ( ) ; }
target:  Prints the fields of a document for human consumption. 