Manage'Scripting Define Symbols' on the GUI for Unity Editor

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unity2017 or later

• Manage'Scripting Define Symbols' on the GUI.
• You can change the disabled / enabled of the registered definition with the check box.
• Supports definitions for each platform.

1. Copy to 'Assets/Editor'.
   DefineSymbols.cs
2. Select 'Tools/Define Symbols'.

see more detail (japanese): https://www.create-forever.games/scripting-define-symbols2/