code: public boolean is(ComparisonExpression expr) {
  		try {
  			if (expr != null) {
  				return expr.evaluate(node);
  			}
  		} catch (MissingNodeException e) {
  			return false;
  		}
  
  		return false;
  	}
docs: Verifies if the passed expression is true for the JsonNode
  
  @param expr
  Comparison expression to be evaluated
  @return returns if the expression is true for the JsonNode