Is it possible to rotate the Symmetry tool's axis?

Description of the Problem, or Question?

Far as I could tell I couldn’t, so can someone tell me how, or if it’s not possible can it be added in the future?

Basic System Details

MyPaint version:

Operating System + Version:
Windows 10 64bit

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Hi there,
it is possible in the tool’s options (the gear icon) > “Angle”

Is it possible I’m behind on a version, because I don’t see that slider in the tool’s options; every other setting is there, but there’s no setting for angle.