@startuml
class HorizontalLineTest {
    + line0 : int
}
class HorizontalLineNest1 {
    + line1 : int
}
class HorizontalLineNest2 {
    + line2 : int
}
MonoBehaviour <|-- HorizontalLineTest
HorizontalLineTest --> "nest1" HorizontalLineNest1
HorizontalLineNest1 --> "nest2" HorizontalLineNest2
@enduml