private EqlUnaryExpr una(String opName, EqlExpr arg) { return new EqlUnaryExpr(EqlOp.fromName(opName), arg); }
private EqlBinaryExpr bin(EqlExpr arg1, String opName, EqlExpr arg2) { return new EqlBinaryExpr(arg1, EqlOp.fromName(opName), arg2); }