Returns a glissando.
A glissando
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Example
a = FoscStaff(FoscLeafMaker().(#[60,62,64,65], [1/8]));
a[0..].glissando;
a.show;
With stems set to true.
a = FoscStaff(FoscLeafMaker().(#[60,62,64,65], [1/8]));
a[0..].glissando(stems: true);
a.show;
Glissandos can be tweaked.
a = FoscStaff(FoscLeafMaker().(#[60,62,64,65], [1/8]));
a[0..].glissando(stems: true, tweaks: #[['thickness', 4], ['color', 'red']]);
a.show;