Excludes undisplayed text (text marked with tags that set the
invisibility attribute) if @include_hidden_chars is %FALSE.
Does not include characters representing embedded images, so
byte and character indexes into the returned string do not
correspond to byte and character indexes into the buffer.
Contrast with [method@Gtk.TextBuffer.get_slice].
Returns the text in the range [@start,@end).
Excludes undisplayed text (text marked with tags that set the invisibility attribute) if @include_hidden_chars is %FALSE. Does not include characters representing embedded images, so byte and character indexes into the returned string do not correspond to byte and character indexes into the buffer. Contrast with [method@Gtk.TextBuffer.get_slice].