Null handling issues

#### Description:

...as found by the bot:

_BH.Engine.Revit.Query.UserInfoString(Assembly assembly)
Error: A NullReferenceException was received from method BH.Engine.Revit.Query.UserInfoString(Assembly assembly).
BH.Engine.Revit.Query.UserInfoString(MethodInfo methodInfo)
Error: A NullReferenceException was received from method BH.Engine.Revit.Query.UserInfoString(MethodInfo methodInfo).
BH.Engine.Revit.Query.PanelName(MethodInfo methodInfo)
Error: A NullReferenceException was received from method BH.Engine.Revit.Query.PanelName(MethodInfo methodInfo).
BH.Engine.Revit.Query.InfoString(MethodInfo methodInfo)
Error: A NullReferenceException was received from method BH.Engine.Revit.Query.InfoString(MethodInfo methodInfo).
BH.Engine.Revit.Query.FiltersDescription(IScenario scenario, String[] elementLabels)
Warning: Failed to generate inputs for method BH.Engine.Revit.Query.FiltersDescription(IScenario scenario, String[] elementLabels). It will not be tested.
Inner results:
Sequence contains no elements
BH.Engine.Revit.Query.ButtonName(MethodInfo methodInfo, Int32 maxCharactersInRow)
Error: A NullReferenceException was received from method BH.Engine.Revit.Query.ButtonName(MethodInfo methodInfo, Int32 maxCharactersInRow).
BH.Engine.Revit.Modify.ResizeIcon(BitmapImage icon, Int32 width, Int32 height)
Error: A ArgumentNullException was received from method BH.Engine.Revit.Modify.ResizeIcon(BitmapImage icon, Int32 width, Int32 height).
BH.oM.Adapters.Revit.Requests.FilterViewsByTemplate.FilterViewsByTemplate(IBHoMObject viewTemplate)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterViewsByTemplate.FilterViewsByTemplate(IBHoMObject viewTemplate).
BH.oM.Adapters.Revit.Requests.FilterTypesOfFamily.FilterTypesOfFamily(IBHoMObject family)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterTypesOfFamily.FilterTypesOfFamily(IBHoMObject family).
BH.oM.Adapters.Revit.Requests.FilterMemberElements.FilterMemberElements(IBHoMObject element)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterMemberElements.FilterMemberElements(IBHoMObject element).
BH.oM.Adapters.Revit.Requests.FilterByVisibleInView.FilterByVisibleInView(IBHoMObject view)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterByVisibleInView.FilterByVisibleInView(IBHoMObject view).
BH.oM.Adapters.Revit.Requests.FilterByViewSpecific.FilterByViewSpecific(IBHoMObject view)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterByViewSpecific.FilterByViewSpecific(IBHoMObject view).
BH.oM.Adapters.Revit.Requests.FilterByParameterElementId.FilterByParameterElementId(String parameterName, IBHoMObject idElement)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterByParameterElementId.FilterByParameterElementId(String parameterName, IBHoMObject idElement).
BH.oM.Adapters.Revit.Requests.FilterByLink.FilterByLink(IBHoMObject linkInstance)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterByLink.FilterByLink(IBHoMObject linkInstance).
BH.oM.Adapters.Revit.Requests.FilterByFamilyType.FilterByFamilyType(IBHoMObject familyType)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterByFamilyType.FilterByFamilyType(IBHoMObject familyType).
BH.oM.Adapters.Revit.Requests.FilterByElementIds.FilterByElementIds(IEnumerable bHoMObjects)
Error: A NullReferenceException was received from method BH.oM.Adapters.Revit.Requests.FilterByElementIds.FilterByElementIds(IEnumerable bHoMObjects).
BH.Engine.Adapters.Revit.Compute.RevitDiffing(IEnumerable pastObjects, IEnumerable followingObjects, String revitIdName, DiffingConfig diffConfig)
Error: A NullReferenceException was received from method BH.Engine.Adapters.Revit.Compute.RevitDiffing(IEnumerable pastObjects, IEnumerable followingObjects, String revitIdName, DiffingConfig diffConfig)._