Retrieves the current length of the text in @entry.
This is equivalent to getting @entry's GtkEntryBuffer and calling [method@Gtk.EntryBuffer.get_length] on it.
the current number of characters in GtkEntry, or 0 if there are none.
See Implementation
Retrieves the current length of the text in @entry.
This is equivalent to getting @entry's GtkEntryBuffer and calling [method@Gtk.EntryBuffer.get_length] on it.