question: private String renderTupleExpr ( TupleExpr theExpr ) throws Exception { SparqlTupleExprRenderer aRenderer = new SparqlTupleExprRenderer ( ) ; aRenderer . mIndent = mIndent ; aRenderer . mContexts = new HashMap < TupleExpr , Var > ( mContexts ) ; return aRenderer . render ( theExpr ) ; }
target:  Renders the tuple expression as a query string. It creates a new SparqlTupleExprRenderer rather than reusing this one.