LazyCollections (yangtools-docs 7.0.1 API)

java.lang.Object
- org.opendaylight.yangtools.util.LazyCollections

```
public final class LazyCollections
extends Object
```
Utility methods for lazily instantiated collections. These are useful for situations when we start off with an empty collection (where Collections.empty() * can be reused), but need to add more things.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <E> List<E>`	`lazyAdd(List<E> list, E obj)`	Add an element to a list, potentially transforming the list.
`static <E> Set<E>`	`lazyAdd(Set<E> set, E obj)`	Add an element to a set, potentially transforming the set.

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

- Method Detail
  - lazyAdd
```
public static <E> List<E> lazyAdd(List<E> list,
                                  E obj)
```
    Add an element to a list, potentially transforming the list.
    
    Type Parameters:
    
    E - the type of elements in the list
    
    Parameters:
    
    list - Current list
    
    obj - Object that needs to be added
    
    Returns:
    
    new list
  - lazyAdd
```
public static <E> Set<E> lazyAdd(Set<E> set,
                                 E obj)
```
    Add an element to a set, potentially transforming the set.
    
    Type Parameters:
    
    E - the type of elements in the set
    
    Parameters:
    
    set - Current set
    
    obj - Object that needs to be added
    
    Returns:
    
    new set