ExperimentalOptional__EXPERIMENTAL_DASH_GAP?: numberGap length as fraction of path (0-1).
Optional__EXPERIMENTAL_DASH_LENGTH?: numberDash length as fraction of path (0-1).
Length-scaling mode: dash/gap as fractions of path length (0-1)
Width-scaling mode: dash/gap as multiples of path width (deck.gl style)
Optional__EXPERIMENTAL_DASH_SIZE?: numberDash size as multiple of path width.
Optional__EXPERIMENTAL_GAP_SIZE?: numberGap size as multiple of path width.
Optional__EXPERIMENTAL_DASH_METERS?: numberDash length in meters.
Absolute mode: dash/gap in meters (deterministic regardless of path length)
Optional__EXPERIMENTAL_GAP_METERS?: numberGap length in meters.
Dash configuration options for dashed paths. Uses discriminated union - mode determines which properties are valid.