translate an expression into sparkoperators concode_field_sep Stack<IExpression> stack concode_elem_sep PrefixMapping prefixes concode_field_sep void startVisit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void visit concode_elem_sep void finishVisit
IExpression function ( Expr arg0 ) { ExprWalker . walkBottomUp ( this , arg0 ) ; return stack . pop ( ) ; }