def step_undefined_step_snippets_should_not_exist_for_table(context):
    """
    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 |
    """
    assert context.table, "REQUIRES: table"
    for row in context.table.rows:
        step = row["Step"]
        step_undefined_step_snippet_should_not_exist_for(context, step)