func (m *_Metric1[T]) Count(v T) int {
	m.mu.Lock()
	defer m.mu.Unlock()
	return m.m[v]
}

// Metrics returns all the values we've seen, in an indeterminate order.
func (m *_Metric1[T]) Metrics() []T {
	return _Keys(m.m)
}

type key2[T1, T2 comparable] struct {
	f1 T1
	f2 T2
}

// _Metric2 tracks metrics of pairs of values.
type _Metric2[T1, T2 comparable] struct {
	mu sync.Mutex

package metrics

import "sync"

type Metric1[T comparable] struct {
	mu sync.Mutex
	m  map[T]int
}

func (m *Metric1[T]) Add(v T) {
	m.mu.Lock()
	defer m.mu.Unlock()
	if m.m == nil {
		m.m = make(map[T]int)
	}
	m[v]++
}

type key2[T1, T2 comparable] struct {
	f1 T1
	f2 T2
}

type Metric2[T1, T2 cmp2] struct {
	mu sync.Mutex
	m  map[key2[T1, T2]]int
}

setattr(_current_module, "enable_v2_behavior", enable_v2_behavior)

# Add module aliases
_losses = _KerasLazyLoader(
    globals(), submodule="losses", name="losses", mode="v2")
_metrics = _KerasLazyLoader(
    globals(), submodule="metrics", name="metrics", mode="v2")
_optimizers = _KerasLazyLoader(
    globals(), submodule="optimizers", name="optimizers", mode="v2")
_initializers = _KerasLazyLoader(

_metrics = _KerasLazyLoader(globals(), submodule="metrics", name="metrics")
_optimizers = _KerasLazyLoader(
    globals(), submodule="optimizers", name="optimizers")
_initializers = _KerasLazyLoader(
    globals(), submodule="initializers", name="initializers")
setattr(_current_module, "losses", _losses)
setattr(_current_module, "metrics", _metrics)
setattr(_current_module, "optimizers", _optimizers)

- Metrics can now be disabled explicitly via a command line flag (i.e. '--disabled-metrics=metric1,metric2') ([#99217](https://github.com/kubernetes/kubernetes/pull/99217), [@logicalhan](https://github.com/logicalhan))