
public final class DI

Fields
Modifier and Type	Field	Description
`private static DI`	`instance`

Modifier and Type	Method	Description
`static DI`	`getInstance()`
`static void`	`reset()`
`synchronized <T> T`	`getSingletonInstance(Class<T> key)`	Return the instance of a singleton if it exists, null otherwise
`synchronized <T> void`	`addSingletonInstance(Class<T> key, T instance)`	Return the instance of a singleton if it exists, null otherwise

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

getSingletonInstance
```
@Nullable() synchronized <T> T getSingletonInstance(Class<T> key)
```
Return the instance of a singleton if it exists, null otherwise

@Nullable() synchronized <T> void addSingletonInstance(Class<T> key, T instance)

Return the instance of a singleton if it exists, null otherwise

Class DI