Kotlin on Twitter: "If you have a nullable reference to a function (or are accessing elements of a map of functions / function references), you can combine the safe call operator “?.”
Kotlin: Null Safety. Kotlin's type system is aimed at… | by MJ Manaog | Medium
Kotlin. Null-safety. General information. Symbol ?. Operators ?. and ?: | BestProg
WHAT IS KOTLIN NULLABLE VARIABLE | EXPLAIN SAFE CALL IN KOTLIN | CODE EXAMPLE DEMO | InterviewDOT - YouTube