code: def step_undefined_step_snippets_should_not_exist_for_table(context):
      
      assert context.table, "REQUIRES: table"
      for row in context.table.rows:
          step = row["Step"]
          step_undefined_step_snippet_should_not_exist_for(context, step)
docs: Checks if undefined-step snippets are not provided.
  
      EXAMPLE:
          Then undefined-step snippets should not exist for:
              | Step |
              | When an known step is used |
              | Then another known step is used |