# Abstract type enumeration and interface
**URL:** https://discourse.julialang.org/t/abstract-type-enumeration-and-interface/110723
**Category:** New to Julia
**Tags:** type-hierarchy
**Created:** [February 25, 2024, 3:51am UTC](https://discourse.julialang.org/t/abstract-type-enumeration-and-interface/110723 "2024-02-25T03:51:19Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@thinhle](https://discourse.julialang.org/u/thinhle)
#### Post date: [February 25, 2024, 3:51am UTC](https://discourse.julialang.org/t/abstract-type-enumeration-and-interface/110723/1 "2024-02-25T03:51:19Z")
Might be a redundant question but after a quick search I could not find what I need. Say I am `using SomeModule`, what’s the recommended way to explore all abstract types defined in this module and also in `Base` (presumably loaded on start up)? Is there a way to explore all abstract types defined in the whole Julia ecosystem? How about interfaces that come defined with these abstract types? Thanks!
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### Author:  [@screw\_dog](https://discourse.julialang.org/u/screw_dog)
#### Post date: [February 25, 2024, 5:47am UTC](https://discourse.julialang.org/t/abstract-type-enumeration-and-interface/110723/2 "2024-02-25T05:47:01Z")
The basic tools provided are in the `InteractiveUtils` package which is loaded by default in the REPL. The main functions `subtypes`, `supertypes`, and `methodswith` allow for exploration of the currently loaded type tree and methods defined on a particular type.
I suspect there’s a more fully featured package out there but these are the basics.