Lists (Pathling 6.2.3 API)

java.lang.Object
- au.csiro.pathling.utilities.Lists

```
public abstract class Lists
extends Object
```
Utility class containing some List helper functions.

Author:

Piotr Szul

Constructor Summary

Constructors
Constructor Description

Lists()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <T> List<T>`	`normalizeEmpty(List<T> list)`	Returns an empty list if the input list is empty; otherwise, returns the input list.
`static List<String>`	`normalizeEmpty(Optional<List<String>> maybeList)`	Returns an empty list if the input list is not present; otherwise, returns the input list.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Lists
```
public Lists()
```
- Method Detail
  - normalizeEmpty
```
@Nonnull
public static <T> List<T> normalizeEmpty(@Nonnull
                                         List<T> list)
```
    Returns an empty list if the input list is empty; otherwise, returns the input list.
    
    Type Parameters:
    
    T - the type of elements in the list
    
    Parameters:
    
    list - the list to normalize
    
    Returns:
    
    an empty list if the input list is empty; otherwise, the input list
  - normalizeEmpty
```
@Nonnull
public static List<String> normalizeEmpty(@Nonnull
                                          Optional<List<String>> maybeList)
```
    Returns an empty list if the input list is not present; otherwise, returns the input list.
    
    Parameters:
    
    maybeList - the list to normalize
    
    Returns:
    
    an empty list if the input list is not present; otherwise, the input list