IntelliJ IDEA
IntelliJ IDEA – the Leading Java and Kotlin IDE, by JetBrains
Features
Flex Method Hierarchy View
The Method Hierarchy action (Ctrl+Shift+H shortcut or View menu, Method Hierarchy) works in IntelliJ IDEA 9 (Maia) for Flex sources (*.mxml and *.as files) in the same way as for Java.