Is your feature request related to a problem?

Sometimes, type parameters have a clear default value. Currently, however, all type parameters must always be set.

Desired solution

• Same syntax as for optional parameters: class C<T = Int>
• Check: No required type parameters after optional parameters
• Adjust check: Type parameter not set
• Adjust check: Too many type parameters

Possible alternatives (optional)

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Screenshots (optional)

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Additional Context (optional)

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