* Working example showing how to use this library */.

* The below method throws error since the parameters in expr1 (foo) does not match with parameters in expr2 ( foo, boo) */.

* We can provide nested bracket as below */.

* Since && has precendence over ||, note in the example that brackets are not necessary */.

* The below method throws error since the expression contains unsupported comparators like > , < */.

* The below method throws error since the expression contains unsupported operators like and, or */.