}

func (subst *subster) tuple(t *Tuple) *Tuple {
	if t != nil {
		if vars, copied := subst.varList(t.vars); copied {
			return &Tuple{vars: vars}
		}
	}
	return t
}

func (subst *subster) varList(in []*Var) (out []*Var, copied bool) {
	out = in
	for i, v := range in {
		if w := subst.var_(v); w != v {
			if !copied {
				// first variable that got substituted => allocate new out slice

}

func (subst *subster) tuple(t *Tuple) *Tuple {
	if t != nil {
		if vars, copied := subst.varList(t.vars); copied {
			return &Tuple{vars: vars}
		}
	}
	return t
}

func (subst *subster) varList(in []*Var) (out []*Var, copied bool) {
	out = in
	for i, v := range in {
		if w := subst.var_(v); w != v {
			if !copied {
				// first variable that got substituted => allocate new out slice

  }

  private CharStreams() {}

  /**
   * Copies all characters between the {@link Readable} and {@link Appendable} objects. Does not
   * close or flush either object.
   *
   * @param from the object to read from
   * @param to the object to write to
   * @return the number of characters copied
   * @throws IOException if an I/O error occurs
   */
  @CanIgnoreReturnValue

// checkCopyLocksAssign checks whether an assignment
// copies a lock.
func checkCopyLocksAssign(pass *analysis.Pass, as *ast.AssignStmt) {
	for i, x := range as.Rhs {
		if path := lockPathRhs(pass, x); path != nil {
			pass.ReportRangef(x, "assignment copies lock value to %v: %v", analysisutil.Format(pass.Fset, as.Lhs[i]), path)
		}
	}
}

// checkCopyLocksGenDecl checks whether lock is copied
// in variable declaration.

      long oldPosition = sourceChannel.position();
      long position = oldPosition;
      long copied;
      do {
        copied = sourceChannel.transferTo(position, ZERO_COPY_CHUNK_SIZE, to);
        position += copied;
        sourceChannel.position(position);
      } while (copied > 0 || position < sourceChannel.size());
      return position - oldPosition;
    }

    assertEquals(I18N.length(), copied);
  }

  public void testCopy_toWriter_fromReader() throws IOException {
    StringWriter writer = new StringWriter();
    long copied = CharStreams.copy(new StringReader(ASCII), writer);
    assertEquals(ASCII, writer.toString());
    assertEquals(ASCII.length(), copied);

    StringWriter writer2 = new StringWriter();
    copied = CharStreams.copy(new StringReader(I18N), writer2);

    assertEquals(I18N.length(), copied);
  }

  public void testCopy_toWriter_fromReader() throws IOException {
    StringWriter writer = new StringWriter();
    long copied = CharStreams.copy(new StringReader(ASCII), writer);
    assertEquals(ASCII, writer.toString());
    assertEquals(ASCII.length(), copied);

    StringWriter writer2 = new StringWriter();
    copied = CharStreams.copy(new StringReader(I18N), writer2);

	Type   Type
}

func (e *ValueError) Error() string {
	return "syscall/js: call of " + e.Method + " on " + e.Type.String()
}

// CopyBytesToGo copies bytes from src to dst.
// It panics if src is not a Uint8Array or Uint8ClampedArray.
// It returns the number of bytes copied, which will be the minimum of the lengths of src and dst.
func CopyBytesToGo(dst []byte, src Value) int {
	n, ok := copyBytesToGo(dst, src.ref)

        // is empty.
        Collection<T> copied = null;
        for (T t : this) {
            if (copied == null) {
                copied = Lists.newArrayListWithExpectedSize(estimatedSize());
            }
            copied.add(t);
        }
        if (copied != null) {
            for (T t : copied) {
                decoratedAction.execute(t);
            }
        }
    }

    while ((skipped = skipUpTo(in, Integer.MAX_VALUE)) > 0) {
      count += skipped;
    }
    return count;
  }

  /**
   * Copies the contents of this byte source to the given {@code OutputStream}. Does not close
   * {@code output}.
   *
   * @return the number of bytes copied
   * @throws IOException if an I/O error occurs while reading from this source or writing to {@code
   *     output}
   */