ConstReadonlyAT_LEAST: "atLeast"Line spacing is at least the specified value
ReadonlyAUTO: "auto"Line spacing is automatically determined based on content
ReadonlyEXACT: "exact"Line spacing is exactly the specified value (alias for EXACTLY)
ReadonlyEXACTLY: "exactly"Line spacing is exactly the specified value
Line spacing rule types.
Specifies how the line height is calculated.