1 /*
2  * Copyright 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.xr.runtime
18 
19 import androidx.annotation.RestrictTo
20 import androidx.xr.runtime.internal.Runtime
21 
22 /** Class in charge of extending [CoreState] with a sub-state by using the [Runtime]. */
23 @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
24 public interface StateExtender {
25     /** Initializes the [StateExtender]. */
initializenull26     public fun initialize(runtime: Runtime)
27 
28     /** Extends [CoreState] with a package-specific sub-state. */
29     public suspend fun extend(coreState: CoreState)
30 }
31