[gtkada] Gtk_Text_Attributes versus Gtk_Text_Appearance

[Pascal]

Hello, in specification gtk-text_attributes.ads, 2 types Gtk_Text_Attributes and Gtk_Text_Appearance appear respectively for some set procedures and get functions.
For instance Set_Fg_Color at line 3 and Get_Fg_Color at line 9.

	1.	   procedure Set_Fg_Color
	2.	 
	3.	     (Appearance : Gtk_Text_Appearance
	4.	; 
	5.	      Color      : Gdk.Color.Gdk_Color
	6.	); 
	7.	   function Get_Fg_Color
	8.	 
	9.	     (Appearance : Gtk_Text_Attributes
	10.	) return Gdk.Color.Gdk_Color
	11.	; 
	12.	   --  The color used to display the text 

Curiously the map C functions have only  GtkTextAppearance type.

Why 2 different types in Ada spec ?

Regards, Pascal.
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