key or null if no row matches key.
EntryCompletion.computePrefix
string computePrefix(string key)Computes the common prefix that is shared by all rows in completion that start with key. If no row matches key, null will be returned. Note that a text column must have been set for this function to work, see [gtk.entry_completion.EntryCompletion.setTextColumn] for details.
Parameters
key | The text to complete for |
Returns
The common prefix all rows starting with