ExitCodeExceptionMapper (Spring Boot API)

Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ExitCodeExceptionMapper
```
Strategy interface that can be used to provide a mapping between exceptions and exit codes.
Since:
1.3.2

- Method Summary
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  int getExitCode(Throwable exception)
  Returns the exit code that should be returned from the application.

- Method Detail
  - getExitCode
```
int getExitCode(Throwable exception)
```
    Returns the exit code that should be returned from the application.
    Parameters:
    exception - the exception causing the application to exit
    Returns:
    the exit code or 0.