(grob-property-description 'no-spacing-rods boolean? "read from grobs: boolean that makes Separation_item ignore this item (MOVE ME TO ITEM).")
(grob-property-description 'no-stem-extend boolean? "should stem not be extended to middle staff line?.")
(grob-property-description 'non-default boolean? "not set because of existence of a bar?.")
-(grob-property-description 'note-character string? "character to print in a note head.")
(grob-property-description 'note-width number? "unit for horizontal translation, measured in staff-space.")
(grob-property-description 'note-heads list? "List of note head grobs")
(grob-property-description 'number-gap number? "size of the gap for tohe number in a tuplet.")