public ReqlExpr Parse( ReqlExpr expression, QueryModel queryModel, Expression predicate )
 {
     return expression.Filter( x => x["reduction"].Contains( reqlExpr => GetWhereReqlAst( reqlExpr, predicate ) ) );
 }
 public ReqlExpr Parse( ReqlExpr expression, QueryModel queryModel, Expression predicate )
 {
     return expression.Filter( reqlExpr => GetWhereReqlAst( reqlExpr, predicate, queryModel ) );
 }