Return a mapping which defines the nodes and keys that this filter
applies to.
If the map is null
then this filter is applicable for all
nodes within the scope. The map can also be null
if
the given scope is not known to this filter.
The keys in the table are Strings and describe the node path. The values are
an optional array of
PreferenceFilterEntry objects describing the list of
applicable keys in that node. If the value is null then the whole node is
considered applicable.
key: String
(node)
value: PreferenceFilterEntry[]
or null
(preference keys)
For example:
"org.eclipse.core.resources" -> null
"org.eclipse.ui" -> new PreferenceFilterEntry[] {
new PreferenceFilterEntry("DEFAULT_PERSPECTIVE_LOCATION"),
new PreferenceFilterEntry("SHOW_INTRO_ON_STARTUP")}