JMap.Layer.Thematic.existsById
Returns true if the thematic exists for the given layer and thematic ids, false otherwise.
The JMap layer id
The thematic id
// test for thematic existenceJMap.Layer.Thematic.existsById(4, 3)// false Copy
// test for thematic existenceJMap.Layer.Thematic.existsById(4, 3)// false
JMap.Layer.Thematic.existsById
Returns true if the thematic exists for the given layer and thematic ids, false otherwise.