Once you've created a graphics layer (as described in How to add a graphics layer), you need to add graphics to it to display data. In most cases, you'll create graphics using geometries that have been created by actions such as executing a query or drawing a shape on the map.
/ Classtalk : A classroom communication system for active learning. In: Journal of Computing in Higher Education. 1996 ; Vol. 7, No. 2. pp. 3-47 @article{cc819104b3034becb09019ef6c28d94c,
Type checking is performed at run time, rather than compiling time. Smalltalk also offers tremendous runtime application modification and maneuverability, which extends to syntax or the integrated development environment (IDE). The central concept in Smalltalk is an object, which is an instance of a class.