for r.Free() > 0 {
		ip, err := r.AllocateNext()
		if err != nil {
			t.Fatalf("error @ free: %d count: %d: %v", r.Free(), count, err)
		}
		count++
		if found.Has(ip.String()) {
			t.Fatalf("allocated %s twice: %d", ip, count)
		}
		found.Insert(ip.String())
	}
	if count != 14 {
		t.Fatalf("expected 14 IPs got %d", count)
	}
	if _, err := r.AllocateNext(); err == nil {
		t.Fatal(err)
	}

		errors:    2,
	}
	expectMetrics(t, cidrIPv4, em)

	// allocate 264 addresses for each allocator
	// the full range and 10 more (254 + 10 = 264) for IPv4
	for i := 0; i < 264; i++ {
		a.AllocateNext()
		b.AllocateNext()
	}
	em = testMetrics{
		free:      0,
		used:      254,
		allocated: 256, // this is a counter, we already had 2 allocations and we did 254 more
		errors:    12,
	}

			}
			if a == nil {
				return
			}
			p, err := a.AllocateNext()
			if err == nil && tc.expectErr {
				t.Errorf("a.AllocateNext() = nil, want error")
			}
			if err != nil && !tc.expectErr {
				t.Errorf("a.AllocateNext() = %+v, want no error", err)
			}
			if !tc.expectErr {
				if p != nil && p.String() != tc.expectedCIDR {
					t.Fatalf("a.AllocateNext() got %+v, want %+v", p.String(), tc.expectedCIDR)
				}
			}

	count := 0
	for r.Free() > 0 {
		p, err := r.AllocateNext()
		if err != nil {
			t.Fatalf("error @ %d: %v", count, err)
		}
		count++
		if !pr.Contains(p) {
			t.Fatalf("allocated %d which is outside of %v", p, pr)
		}
		if found.Has(strconv.Itoa(p)) {
			t.Fatalf("allocated %d twice @ %d", p, count)
		}
		found.Insert(strconv.Itoa(p))
	}
	if _, err := r.AllocateNext(); err != ErrFull {
		t.Fatal(err)
	}

		errors:    2,
	}
	expectMetrics(t, cidrIPv4, em)

	// allocate 264 addresses for each allocator
	// the full range and 10 more (254 + 10 = 264) for IPv4
	for i := 0; i < 264; i++ {
		a.AllocateNext()
		b.AllocateNext()
	}
	em = testMetrics{
		free:      0,
		used:      254,
		allocated: 256, // this is a counter, we already had 2 allocations and we did 254 more
		errors:    12,
	}

		t.Run(tc.name, func(t *testing.T) {
			m := tc.allocator(tc.max, "test", tc.reserved)
			for i := 0; i < tc.max; i++ {
				if _, ok, _ := m.AllocateNext(); !ok {
					t.Fatalf("unexpected error")
				}
			}
			if _, ok, _ := m.AllocateNext(); ok {
				t.Errorf("unexpected success")
			}
			if f := m.Free(); f != 0 {
				t.Errorf("expect to get %d, but got %d", 0, f)
			}
		})
	}
}

	r.metrics.setAvailable(label.String(), r.Free())

	return nil
}

// AllocateNext reserves one of the IPs from the pool. ErrFull may
// be returned if there are no addresses left.
func (r *Range) AllocateNext() (net.IP, error) {
	return r.allocateNext(dryRunFalse)
}

func (r *Range) allocateNext(dryRun bool) (net.IP, error) {
	label := r.CIDR()
	if dryRun {

	}
	return a.createIPAddress(ip.String(), svc, "static")
}

// AllocateNext return an IP address that wasn't allocated yet.
// Only for testing, it will fail to create the IPAddress object because
// the Service reference is required.
func (a *Allocator) AllocateNext() (net.IP, error) {
	return a.AllocateNextService(nil)
}

// AllocateNext return an IP address that wasn't allocated yet.

		ip, err := allocator.AllocateNextService(service)
		if err == nil {
			return ip, nil
		}
	}
	return nil, ErrFull
}

func (c *MetaAllocator) AllocateNext() (net.IP, error) {
	c.muTree.Lock()
	defer c.muTree.Unlock()

	// TODO(aojea) add strategy to return a random allocator but
	// taking into consideration the number of addresses of each allocator.

				if ok {
					allocatedIP, err = svcAllocator.AllocateNextService(service)
				} else {
					allocatedIP, err = allocator.AllocateNext()
				}
			} else {
				allocatedIP, err = allocator.AllocateNext()
			}
			if err != nil {
				return allocated, errors.NewInternalError(fmt.Errorf("failed to allocate a serviceIP: %v", err))
			}
			allocated[family] = allocatedIP.String()