public static class TwoArg {
    /** Action to take on a null param. */
    public enum Action {
      THROW_A_NPE {
        @Override
        public void act() {
          throw new NullPointerException();
        }
      },
      THROW_OTHER {
        @Override
        public void act() {
          throw new FooException();
        }
      },
      JUST_RETURN {
        @Override

  }

  // Set up a flushable to expect to be flushed, and optionally to
  // throw an exception.
  private void setupFlushable(boolean shouldThrowOnFlush) throws IOException {
    mockFlushable = mock(Flushable.class);
    if (shouldThrowOnFlush) {
      doThrow(
              new IOException(
                  "This should only appear in the " + "logs. It should not be rethrown."))
          .when(mockFlushable)
          .flush();
    }

    }
    Closer closer = Closer.create();
    try {
      InputStream in = closer.register(openStream());
      return in.read() == -1;
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**
   * Returns the size of this source in bytes, if the size can be easily determined without actually
   * opening the data stream.

    try {
      OutputStream out = closer.register(openStream());
      out.write(bytes);
      out.flush(); // https://code.google.com/p/guava-libraries/issues/detail?id=1330
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

  /**
   * Writes all the bytes from the given {@code InputStream} to this sink. Does not close {@code
   * input}.
   *

   *   try {
   *     // ... code which does something with the stream ...
   *     threw = false;
   *   } finally {
   *     // If an exception occurs, rethrow it only if threw==false:
   *     Closeables.close(stream, threw);
   *   }
   * }
   * }</pre>
   *
   * @param closeable the {@code Closeable} object to be closed, or null, in which case this method
   *     does nothing

  private Flushables() {}

  /**
   * Flush a {@link Flushable}, with control over whether an {@code IOException} may be thrown.
   *
   * <p>If {@code swallowIOException} is true, then we don't rethrow {@code IOException}, but merely
   * log it.
   *
   * @param flushable the {@code Flushable} object to be flushed.
   * @param swallowIOException if true, don't propagate IO exceptions thrown by the {@code flush}

                    new ProjectExecutionEvent(session, currentProject, t));

            // rethrow original errors and runtime exceptions
            if (t instanceof RuntimeException) {
                throw (RuntimeException) t;
            }
            if (t instanceof Error) {
                throw (Error) t;
            }
        } finally {
            session.setCurrentProject(null);

import static java.util.concurrent.Executors.newSingleThreadExecutor;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.timeout;
import static org.mockito.Mockito.verify;

import com.google.common.collect.ImmutableList;
import com.google.common.reflect.Reflection;

import static java.util.concurrent.Executors.newSingleThreadExecutor;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.timeout;
import static org.mockito.Mockito.verify;

import com.google.common.collect.ImmutableList;
import com.google.common.reflect.Reflection;

    RuntimeException exception3 = new ArithmeticException("exception from stream 3");
    Stream<String> stream1 = Stream.of("foo", "bar").onClose(doThrow(exception1));
    Stream<String> stream2 = Stream.of("baz", "buh").onClose(doThrow(exception2));
    Stream<String> stream3 = Stream.of("quux").onClose(doThrow(exception3));
    RuntimeException exception = null;
    try (Stream<String> concatenated = Streams.concat(stream1, stream2, stream3)) {