+(ly:add-interface
+ 'string-number-interface
+ "A string number instruction"
+ '()
+ )
+
+(ly:add-interface
+ 'fret-diagram-interface
+ "A fret diagram"
+ '(align-dir barre-type dot-color dot-radius finger-code fret-count
+ label-dir number-type size string-count thickness)
+)
+