ExtensionSource (Manifold :: Extensions Runtime 2026.1.6 API)

```
@Retention(CLASS)
@Repeatable(ExtensionSources.class)
public @interface ExtensionSource
```
Use this annotation to indicate a class is a class which methods can be used as Manifold Extension methods. Methods don't need to be annotated with Extension, nor need the method parameters be annotated with This or ThisClass.

Field Summary

Fields
Modifier and Type	Fields	Description
`static String`	`methods`	Definitions of methods to be added or excluded, depending on the `type`
`static String`	`overrideExistingMethods`	If overrideExistingMethods is true, existing methods can be overridden by extension methods
`static String`	`source`	The source class, which contains methods that can be used as Manifold Extension methods
`static String`	`type`	When `methods` are configured, the types defines if the methods are included or excluded to be added as extension methods

Required Element Summary

Required Elements
Modifier and Type Required Element Description

Class source

Optional Element Summary

Optional Elements
Modifier and Type Optional Element Description

MethodSignature[] methods

boolean overrideExistingMethods

ExtensionMethodType type

- Field Detail
  - source
```
static final String source
```
    The source class, which contains methods that can be used as Manifold Extension methods
- - overrideExistingMethods
```
static final String overrideExistingMethods
```
    If overrideExistingMethods is true, existing methods can be overridden by extension methods
- - type
```
static final String type
```
    When methods are configured, the types defines if the methods are included or excluded to be added as extension methods
- - methods
```
static final String methods
```
    Definitions of methods to be added or excluded, depending on the type
- Element Detail
  - source
```
Class source
```
- - overrideExistingMethods
```
boolean overrideExistingMethods
```
    Default:
    
    false
- - type
```
ExtensionMethodType type
```
    Default:
    
    manifold.ext.rt.api.ExtensionMethodType.EXCLUDE
- - methods
```
MethodSignature[] methods
```
    Default:
    
    {}