Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "TernarySampleIW[XI@__getitem__]"     "TernarySampleIW[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)

Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "TernarySample[XI@__getitem__]"     "TernarySample[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)

Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "BinarySampleIW[XI@__getitem__]"     "BinarySampleIW[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)

Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "BinarySample[XI@__getitem__]"     "BinarySample[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)

Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "SubgroupSampleIW[XI@__getitem__]"     "SubgroupSampleIW[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)

Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "SubgroupSample[XI@__getitem__]"     "SubgroupSample[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)

Method "__getitem__" overrides class "SampleBase" in an incompatible manner   Return type mismatch: base method returns type "SampleBase[XI@__getitem__]", override returns type "NamedSample[XI@__getitem__]"     "NamedSample[XI@__getitem__]" is incompatible with "SampleBase[XI@__getitem__]"       Type parameter "X@SampleBase" is invariant, but "XI@__getitem__" is not the same as "XI@__getitem__" (reportIncompatibleMethodOverride)