Enumerates every (icon × tint) pair the config actually references, so the
MapLibre adapter can rasterise and register exactly those images.
Only pairs a feature could really resolve to — never the cartesian product of
every symbol by every colour. Entries with no iconColor are omitted: they need
no variant, since the untinted image is already registered by the raw sprite pass.
Enumerates every (icon × tint) pair the config actually references, so the MapLibre adapter can rasterise and register exactly those images.
Only pairs a feature could really resolve to — never the cartesian product of every symbol by every colour. Entries with no
iconColorare omitted: they need no variant, since the untinted image is already registered by the raw sprite pass.