question: public void toEPL ( StringWriter writer ) { writer . write ( "update istream " ) ; writer . write ( eventType ) ; if ( this . optionalAsClauseStreamName != null ) { writer . write ( " as " ) ; writer . write ( optionalAsClauseStreamName ) ; } writer . write ( " " ) ; renderEPLAssignments ( writer , assignments ) ; if ( optionalWhereClause != null ) { writer . write ( " where " ) ; optionalWhereClause . toEPL ( writer , ExpressionPrecedenceEnum . MINIMUM ) ; } }
target:  Renders the clause in EPL.