Checks for undesired arguments in ellipsis in $draw_leafdown method

Checks arguments in ellipsis for undesired inputs such as `layerId` which may collide with internal structure of leafdown and returns a "cleaned" version of the arguments by removing or redefining problematic inputs. e.g. `layerId` is removed from arg_list when set.

Usage,

check_draw_ellipsis(...)

Arguments

...

Additional arguments given to leaflet::addPolygons

Value

List containing arguments in ... as elements