symbol Sort Key
Sorts features in ascending order based on this value. Features with lower sort keys are drawn and placed first. When iconAllowOverlap or textAllowOverlap is `false`, features with a lower sort key will have priority during placement. When iconAllowOverlap or textAllowOverlap is set to `true`, features with a higher sort key will overlap over features with a lower sort key.
Return
property wrapper around Float
Parameters
value
a Float value