ExtensionMethod (Manifold :: Extensions Runtime 2026.1.6 API)

```
@Target(METHOD)
@Retention(RUNTIME)
public @interface ExtensionMethod
```
!!! For internal use only !!!
This annotation is added to a generated extension method when it is added to the extended class. It serves as a means to efficiently identify an extension method during method call analysis. This annotation is never applied to code on disk.

Field Summary

Fields
Modifier and Type	Fields	Description
`static String`	`extensionClass`
`static String`	`isExtensionSource`	True if the origin of the method is from an (unannotated) class.
`static String`	`isIntercept`	True if the method is intercepted, and it body needs to be rewritten.
`static String`	`isSmartStatic`
`static String`	`isStatic`

Required Element Summary

Required Elements
Modifier and Type	Required Element	Description
`String`	`extensionClass`
`boolean`	`isExtensionSource`
`boolean`	`isIntercept`
`boolean`	`isSmartStatic`
`boolean`	`isStatic`

- Field Detail
  - extensionClass
```
static final String extensionClass
```
- - isStatic
```
static final String isStatic
```
- - isSmartStatic
```
static final String isSmartStatic
```
- - isIntercept
```
static final String isIntercept
```
    True if the method is intercepted, and it body needs to be rewritten. See Intercept
- - isExtensionSource
```
static final String isExtensionSource
```
    True if the origin of the method is from an (unannotated) class. See ExtensionSource
- Element Detail
  - extensionClass
```
String extensionClass
```
- - isStatic
```
boolean isStatic
```
- - isSmartStatic
```
boolean isSmartStatic
```
- - isIntercept
```
boolean isIntercept
```
- - isExtensionSource
```
boolean isExtensionSource
```