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abstract class Application {
	+abstract void start(Stage)
}
class MemoryApp {
	+void start(Stage)
}
class Memory<Integer> {
}

class Text {
}
class TextField {
}
Application <|- MemoryApp
MemoryApp --> Memory: memory
MemoryApp --> Text: systemOutput
MemoryApp --> TextField: userInput

object MemoryApp {
}
object "Memory<Integer>"Memory {
	Integer nextItem()
	acceptItem(Integer)
}

object Text {
	setText(String)	
}
object TextField {
	getText();
}
MemoryApp --> Memory: memory
MemoryApp --> Text: systemOutput
MemoryApp --> TextField: userInput