Annotation for accessors of values that should be published to a NetworkProtocol. Using
annotations to define these methods instead of having the class implement a method in an
interface allows an object (such as
ContoursReport to have arbitrarily many publishable
values. More values (like x, y, width, height, etc...) can be added simply by adding more
accessors with this annotation. One potential way of having multiple values without using
annotations might be to make the interface method return a list, but this would prevent us from
knowing how many values there are and what their names are without having an instance of the
object being published. The weight of each accessor must be specified. This determines order of
the inputs to
PublishAnnotatedOperation. It's important to specify weights if there are
multiple keys because otherwise, different JVMs will return them in different orders, leading to
projects that are interpreted differently on different machines.