;;; f
;;;
(flag-count ,number? "The number of tremolo beams.")
+ (flag-style ,symbol? "The style of the flag to be used with
+@code{MetronomeMark}. Available are @code{'modern-straight-flag},
+@code{'old-straight-flag}, @code{flat-flag}, @code{mensural} and
+@code{'default}")
(flat-positions ,list? "Flats in key signatures are placed
within the specified ranges of staff-positions. The general form
is a list of pairs, with one pair for each type of clef, in order