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public int get_radio_button_group_id ()
Returns the numeric ID the radio button group associated with layer.
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public unowned string get_title ()
Returns the name of the layer suitable for presentation as a title in a viewer's GUI
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public void hide ()
Hides layer. If layer is the parent of other nested layers, such layers will
be also hidden and will be blocked until layer is shown again
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public bool is_parent ()
Returns whether layer is parent of other nested layers.
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public bool is_visible ()
Returns whether layer is visible
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public void show ()
Shows layer
