| Function | __init__ | Undocumented |
| Function | next_step | Undocumented |
| Function | post_init | A virtual method that must be defined on child when it's
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| Function | has_next_step | Undocumented |
| Function | has_previous_step | Undocumented |
| Function | previous_step | Undocumented |
| Function | validate_step | A hook called always when changing steps. If it returns False
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