Method IsMixin

IDEHelper/Compiler/BfResolvedTypeUtils.h:980–983

	void CopyFrom(BfMethodInstance* methodInstance);

	bool IsMixin()
	{
		return mMethodDef->mMethodType == BfMethodType_Mixin;
	}	

	BfImportKind GetImportKind();
	BfMethodFlags GetMethodFlags();