canProduce(String mapFormat) Returns wether the map producers created by this factory can create maps
in the passed output format.
Parameters: mapFormat - a MIME type string to check if this producer is able tohandle.
Returns wether the map producers created by this factory can create maps
in the passed output format.
Parameters: mapFormat - a MIME type string to check if this producer is able tohandle. true if mapFormat == "image/gif",false otherwise.