question: public void toJsonEntryHelper ( Entry entry , StringBuilder result , int level , boolean notTheFirst , boolean skipFirstLinefeed ) { if ( notTheFirst ) { result . append ( ",\n" ) ; } if ( ! skipFirstLinefeed ) appendIndentation ( level , result ) ; result . append ( "{\n" ) ; ++ level ; boolean addedAnyYet = false ; addedAnyYet = JsonBuilder . addPropertyToJsonString ( result , entry . getId ( ) , addedAnyYet , "id" , level ) ; addedAnyYet = JsonBuilder . addPropertyToJsonString ( result , entry . getNote ( ) , addedAnyYet , "note" , level ) ; addedAnyYet = JsonBuilder . addPropertyToJsonString ( result , entry . getFirstChildId ( ) , addedAnyYet , "firstChild" , level ) ; addedAnyYet = JsonBuilder . addPropertyToJsonString ( result , entry . getLastChildId ( ) , addedAnyYet , "lastChild" , level ) ; addedAnyYet = JsonBuilder . addPropertyToJsonString ( result , entry . getPreviousSiblingId ( ) , addedAnyYet , "previousSibling" , level ) ; addedAnyYet = JsonBuilder . addPropertyToJsonString ( result , entry . getNextSiblingId ( ) , addedAnyYet , "nextSibling" , level ) ; ArrayList < Entry > childrenEntries = getChildrenInOrder ( entry ) ; if ( ! childrenEntries . isEmpty ( ) ) { result . append ( ",\n" ) ; appendIndentation ( level , result ) ; result . append ( "\"children\": [\n" ) ; boolean notTheFirstChild = false ; for ( Entry childEntry : childrenEntries ) { toJsonEntryHelper ( childEntry , result , level + 1 , notTheFirstChild , false ) ; notTheFirstChild = true ; } result . append ( "\n" ) ; appendIndentation ( level , result ) ; result . append ( "]" ) ; } -- level ; result . append ( "\n" ) ; appendIndentation ( level , result ) ; result . append ( "}" ) ; }
target:  Helper method. Converts an entry to a JSON string.