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diff --git a/test-runner/src/com/android/internal/util/Predicate.java b/test-runner/src/com/android/internal/util/Predicate.java
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+++ b/test-runner/src/com/android/internal/util/Predicate.java
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+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.util;
+
+/**
+ * A Predicate can determine a true or false value for any input of its
+ * parameterized type. For example, a {@code RegexPredicate} might implement
+ * {@code Predicate<String>}, and return true for any String that matches its
+ * given regular expression.
+ * <p/>
+ * <p/>
+ * Implementors of Predicate which may cause side effects upon evaluation are
+ * strongly encouraged to state this fact clearly in their API documentation.
+ */
+public interface Predicate<T> {
+
+    boolean apply(T t);
+}