Exporting hierarchical-grid to Blazor fails

[HUSSAR-mtrela]

Exporting XPLAT samples to Blazor fails with this error:

 exporting \grids\hierarchical-grid\column-auto-sizing.json               
>> ERROR: Unable to cast object of type 'System.Double' to type 'System.String'. 
   at Infragistics.Controls.Description.DotNetCodeGeneratingComponentRendererDataEmitter.GetPropertyValueString(CodeGeneratingComponentRendererDataEmitterPropertyType type, JsonDictionaryValue jsonVal)
   at Infragistics.Controls.Description.DotNetCodeGeneratingComponentRendererDataEmitter.WriteItem(String typeName, String[] propertyNames, CodeGeneratingComponentRendererDataEmitterPropertyType[] propertyTypes, JsonDictionaryItem item, CodeGeneratingCodeWriter typeWriter)
   at Infragistics.Controls.Description.DotNetCodeGeneratingComponentRendererDataEmitter.AddDataItem(String refName, String[] propertyNames, CodeGeneratingComponentRendererDataEmitterPropertyType[] propertyTypes, JsonDictionaryItem item, Int32 i, CodeGeneratingCodeWriter typeWriter)
   at Infragistics.Controls.Description.CodeGeneratingComponentRendererDataEmitter.EmitNamedData(String refName, JsonDictionaryItem data, CodeGeneratingCodeWriter typeWriter, CodeGeneratingImportManager importsWriter)
   at Infragistics.Controls.Description.CodeGeneratingComponentRendererDataEmitter.EmitData(JsonDictionaryItem refs)
   at Infragistics.Controls.Description.CodeGeneratingComponentRenderer.EmitCode(ICodeGenerationRendererTemplate template)
   at CodeExporterApp.Exporter.OutputSamples(String platform) in E:\BuildAgents_VSTS\3\_work\9\s\Shared\Exporter.cs:line 236

exporting \grids\hierarchical-grid\column-collapsible-groups.json        
>> ERROR: Unable to cast object of type 'System.Double' to type 'System.String'. 
   at Infragistics.Controls.Description.DotNetCodeGeneratingComponentRendererDataEmitter.GetPropertyValueString(CodeGeneratingComponentRendererDataEmitterPropertyType type, JsonDictionaryValue jsonVal)
   at Infragistics.Controls.Description.DotNetCodeGeneratingComponentRendererDataEmitter.WriteItem(String typeName, String[] propertyNames, CodeGeneratingComponentRendererDataEmitterPropertyType[] propertyTypes, JsonDictionaryItem item, CodeGeneratingCodeWriter typeWriter)
   at Infragistics.Controls.Description.DotNetCodeGeneratingComponentRendererDataEmitter.AddDataItem(String refName, String[] propertyNames, CodeGeneratingComponentRendererDataEmitterPropertyType[] propertyTypes, JsonDictionaryItem item, Int32 i, CodeGeneratingCodeWriter typeWriter)
   at Infragistics.Controls.Description.CodeGeneratingComponentRendererDataEmitter.EmitNamedData(String refName, JsonDictionaryItem data, CodeGeneratingCodeWriter typeWriter, CodeGeneratingImportManager importsWriter)
   at Infragistics.Controls.Description.CodeGeneratingComponentRendererDataEmitter.EmitData(JsonDictionaryItem refs)
   at Infragistics.Controls.Description.CodeGeneratingComponentRenderer.EmitCode(ICodeGenerationRendererTemplate template)
   at CodeExporterApp.Exporter.OutputSamples(String platform) in E:\BuildAgents_VSTS\3\_work\9\s\Shared\Exporter.cs:line 236