OdinAttributeDrawer: no suitable method found to override

[Vincent Noel]

Unity version: Unity 2021.1.0b6.1892
What happen: A compilation error occurs when copy pasting the example from the documentation.

How to reproduce it:

• Create an empty project
• Just copy paste the code from here: https://odininspector.com/documentation/sirenix.odininspector.editor.odinattributedrawer-1

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Same error on Odin 3.0.1

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