generateWidePoly() - generates a polygon or polyline with
positive width lw, returns OMVector of x-y array pairs of
coordinates of polygon segments. the parameter altx must
either be null, or a mirror image of xpts.
Allocate to sink until user presses button (like UniversalAllocator),
then remove the allocation and actually allocate to an organization
(like GenericTablePlugin).
The GenericInterpreter is an implementation of QueryInterpreter designed
to return tables of results based on the evaluation of "attributes" at
various points in a parameter space defined by one or more "dimensions".
Returns the height of 1 pixel in the graph coordinate units assumming the largest data value will be
drawn at the entire height of the graph, if not, the exrtaPixels parameter allows pading the height