while (i < args.length) {
        builder.append(", ");
        builder.append(args[i++]);
      }
      builder.append("]");
    }

    return builder.toString();
  }

  private Platform() {}

 *
 * @author Jesse Wilson
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class Platform {
  private static final PatternCompiler patternCompiler = loadPatternCompiler();

  private Platform() {}

  static CharMatcher precomputeCharMatcher(CharMatcher matcher) {
    return matcher.precomputedInternal();
  }

  @JsType(isNative = true, name = "number", namespace = GLOBAL)
  private interface Number {
    double toPrecision(int precision);
  }

  static CommonPattern compilePattern(String pattern) {
    throw new UnsupportedOperationException();
  }

  static boolean patternCompilerIsPcreLike() {
    throw new UnsupportedOperationException();
  }

  private Platform() {}

  }

  static int reduceIterationsIfGwt(int iterations) {
    return iterations;
  }

  static int reduceExponentIfGwt(int exponent) {
    return exponent;
  }

  private Platform() {}

 *
 * @author Jesse Wilson
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class Platform {
  private static final Logger logger = Logger.getLogger(Platform.class.getName());
  private static final PatternCompiler patternCompiler = loadPatternCompiler();

  private Platform() {}

  static CharMatcher precomputeCharMatcher(CharMatcher matcher) {
    return matcher.precomputedInternal();
  }

      return (T) requireNonNull(in.readObject());
    } catch (IOException | ClassNotFoundException e) {
      throw new RuntimeException(e);
    }
  }

  private Platform() {}

      return (T) requireNonNull(in.readObject());
    } catch (IOException | ClassNotFoundException e) {
      throw new RuntimeException(e);
    }
  }

  private Platform() {}

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * @author Jesse Wilson
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
final class Platform {
  private Platform() {}

  /** Returns a thread-local 1024-char array. */
  static char[] charBufferFromThreadLocal() {
    // requireNonNull accommodates Android's @RecentlyNullable annotation on ThreadLocal.get

    System.arraycopy(source, from, result, 0, to - from);
    return result;
  }

  // TODO(user): Move this logic to a utility class.
  @JsType(isNative = true, name = "Array", namespace = JsPackage.GLOBAL)
  private interface NativeArray {
    @JsProperty
    void setLength(int length);
  }

  static MapMaker tryWeakKeys(MapMaker mapMaker) {
    return mapMaker;
  }