All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clean()`
`long`	`id()`	must return unique id (e.g.
`java.lang.String`	`name()`
`void`	`postprocess(FrameData fd, FrameData futureFd)`
`void`	`process(FrameData frameData)`
`boolean`	`requiresMainThread()`

id
```
long id()
```
must return unique id (e.g. a feature pointer or a true random number(most likely) satisfies this criteria)

void process(@Nullable
             FrameData frameData)

void postprocess(@Nullable
                 FrameData fd,
                 @Nullable
                 FrameData futureFd)

Interface Feature