For now all values in ExamplesTable are treated as String and empty values in table cells are resolved as empty strings. However it might be required to have an ability to map certain cells to null-s. At the current moment it can be done at step level (when step accepts ExamplesTable or values from it as input parameters), but it may bring at lot of duplicated logic (or unnecessary boilerplate code) when certain values are transformed into null-s.

• The generic mechanism allowing to mark certain cells values as null-s in ExamplesTable should be introduced

• There should be ability to define null-placeholder at global (Configuration) and local (ExamplesTable) lelves