testcode

type Interface1 interface {
	Method1(value1 string) error
}

type Interface2 interface {
	Method2(value2 string) error
}

type Interface3 interface {
	Interface1
	Interface2
	Method3(value3 string) error
}

type Interface4 interface {
	Interface3
	Method4(value4 string) error
}

type Interface4Impl struct {
}