package main

BAD
// Producer

type CustomerStorage interface {
	StoreCustomer(customer string) error
	GetCustomer(is string) error
	UpdateCustomer(customer string) error
	GetAllCustomers() ([]string,error)
	GetCustomerWithoutContract() ([]string,error)
} 

//======================================


// Consumer

type customerGetter interface {
	GetAllCustomers() ([]string,error)
}



//===================================================================

type IntConfig struct {
	// ...
}

func (c IntConfig) Get() int {        <======== PRODUCER
	return 0
}

func (c IntConfig) Set(value int) {
	//...
}



Consumer

type confifSetter interface{
	Set()
}

type configGetter interface {
	Get() int
}

type Mixed interface {
	confifSetter
	configGetter
}







type Foo struct {
	threshold configGetter
}

func NewFoo(new_threshold configGetter) Foo {
	return Foo{threshold: new_threshold}
}

func (f Foo) Bar() {
	threshold := f.threshold.Get()
}