What should I give in input for Scenario and scenario param and param type in custom keyword in katalon

Question

I am trying to create a custom keyword for cucumber hooks .

@Keyword
public void beforeScenario(Scenario 
 scenario) {
 LOG.logInfo(scenario.getName())
 ....remaining code 
 }

I am getting Null pointer exception error and the input is null for Scenario param Could someone please help me understand what I am missing