suppose there is a mature Eclipse plug-in A Magi A with an input box and a button. Enter an email address in the input box, and click the button to send a pre-written email to the mailbox.
at this point, you want to write an Eclipse plug-in B. when plug-in An is opened, activate plug-in B can automatically enter and send the pre-written email address.
is a bit confusing, which roughly means that Eclipse plug-in development can make it possible for one plug-in to enter something into the input box of another plug-in.