google3/third_party/java_src/junit/main/java/org/junit/function/ThrowingRunnable.java

package org.junit.function;

/**
 * This interface facilitates the use of
 * {@link org.junit.Assert#assertThrows(Class, ThrowingRunnable)} from Java 8. It allows method
 * references to void methods (that declare checked exceptions) to be passed directly into
 * {@code assertThrows}
 * without wrapping. It is not meant to be implemented directly.
 *
 * @since 4.13
 */
public interface ThrowingRunnable {
    void run() throws Throwable;
}