Adds multiple features to this collection. To be preferred over #add for
adding multiple features, because in some systems (like the JUMP Workbench)
fewer events will be fired.
A quick search for features, using an envelope comparison.
Parameters: envelope - the envelope to query against features whose envelopes intersect the given envelope
Removes multiple features from this collection. To be preferred over #remove for
removing multiple features, because in some systems (like the JUMP Workbench)
fewer events will be fired.