ConstReadonlyDouble: "dbl"Double line: two parallel lines of equal width
ReadonlySingle: "sng"Single line: one normal width
ReadonlyThickThin: "thickThin"Double lines: one thick, one thin
ReadonlyThinThick: "thinThick"Double lines: one thin, one thick
ReadonlyTriple: "tri"Three lines: thin, thick, thin
Support stroke with multiple strokes. ** PLACEHOLDER **