getSlice
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. The returned string includes a 0xFFFC character whenever the buffer contains embedded images, so byte and character indexes into the returned string do correspond to byte and character indexes into the buffer. Contrast with method@Gtk.TextBuffer.get_text. Note that 0xFFFC can occur in normal text as well, so it is not a reliable indicator that a paintable or widget is in the buffer.
Return
an allocated UTF-8 string
Parameters
start
start of a range
end
end of a range
includeHiddenChars
whether to include invisible text