bindings.getManagedProperty("thing").type == ModelType.of(InputStream)
    }

    @Managed
    static abstract class WritableMapProperty {
        abstract void setMap(ModelMap<NamedThingInterface> map)
        abstract ModelMap<NamedThingInterface> getMap()
    }

    @Managed
    static abstract class WritableSetProperty {
        abstract void setSet(ModelSet<NamedThingInterface> set)

   */
  protected AbstractMapBasedMultimap(Map<K, Collection<V>> map) {
    checkArgument(map.isEmpty());
    this.map = map;
  }

  /** Used during deserialization only. */
  final void setMap(Map<K, Collection<V>> map) {
    this.map = map;
    totalSize = 0;
    for (Collection<V> values : map.values()) {
      checkArgument(!values.isEmpty());
      totalSize += values.size();
    }
  }

   */
  protected AbstractMapBasedMultimap(Map<K, Collection<V>> map) {
    checkArgument(map.isEmpty());
    this.map = map;
  }

  /** Used during deserialization only. */
  final void setMap(Map<K, Collection<V>> map) {
    this.map = map;
    totalSize = 0;
    for (Collection<V> values : map.values()) {
      checkArgument(!values.isEmpty());
      totalSize += values.size();
    }
  }

}

type ContextStub struct {
	context
}

func (c ContextStub) GetPC() uintptr {
	return c.ip()
}

func NewContextStub() *ContextStub {
	var ctx context
	ctx.set_ip(getcallerpc())
	ctx.set_sp(getcallersp())
	ctx.set_fp(getcallerfp())
	return &ContextStub{ctx}

func (c *context) lr() uintptr      { return 0 }
func (c *context) set_lr(x uintptr) {}

func (c *context) set_ip(x uintptr) { c.eip = uint32(x) }
func (c *context) set_sp(x uintptr) { c.esp = uint32(x) }

// 386 does not have frame pointer register.
func (c *context) set_fp(x uintptr) {}

func prepareContextForSigResume(c *context) {
	c.edx = c.esp
	c.ecx = c.eip
}

func dumpregs(r *context) {

func (c *context) lr() uintptr { return uintptr(c.lrr) }

func (c *context) set_ip(x uintptr) { c.pc = uint32(x) }
func (c *context) set_sp(x uintptr) { c.spr = uint32(x) }
func (c *context) set_lr(x uintptr) { c.lrr = uint32(x) }

// arm does not have frame pointer register.
func (c *context) set_fp(x uintptr) {}

func prepareContextForSigResume(c *context) {
	c.r0 = c.spr
	c.r1 = c.pc
}

// AMD64 does not have link register, so this returns 0.
func (c *context) lr() uintptr      { return 0 }
func (c *context) set_lr(x uintptr) {}

func (c *context) set_ip(x uintptr) { c.rip = uint64(x) }
func (c *context) set_sp(x uintptr) { c.rsp = uint64(x) }
func (c *context) set_fp(x uintptr) { c.rbp = uint64(x) }

func prepareContextForSigResume(c *context) {
	c.r8 = c.rsp
	c.r9 = c.rip
}

func dumpregs(r *context) {

func (c *context) sp() uintptr { return uintptr(c.xsp) }
func (c *context) lr() uintptr { return uintptr(c.x[30]) }

func (c *context) set_ip(x uintptr) { c.pc = uint64(x) }
func (c *context) set_sp(x uintptr) { c.xsp = uint64(x) }
func (c *context) set_lr(x uintptr) { c.x[30] = uint64(x) }
func (c *context) set_fp(x uintptr) { c.x[29] = uint64(x) }

func prepareContextForSigResume(c *context) {
	c.x[0] = c.xsp
	c.x[1] = c.pc
}

	// anyway.
	sp := c.sp() - goarch.PtrSize
	c.set_sp(sp)
	*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.ra()

	pc := gp.sigpc

	if shouldPushSigpanic(gp, pc, uintptr(c.ra())) {
		// Make it look the like faulting PC called sigpanic.
		c.set_ra(uint64(pc))
	}

	// In case we are panicking from external C code
	c.set_gp(uint64(uintptr(unsafe.Pointer(gp))))
	c.set_pc(uint64(abi.FuncPCABIInternal(sigpanic)))

func (c *sigctxt) set_pc(x uint64) { c.regs().sc_regs.pc = x }
func (c *sigctxt) set_ra(x uint64) { c.regs().sc_regs.ra = x }
func (c *sigctxt) set_sp(x uint64) { c.regs().sc_regs.sp = x }
func (c *sigctxt) set_gp(x uint64) { c.regs().sc_regs.gp = x }

func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
func (c *sigctxt) set_sigaddr(x uint64) {