Selects a range of characters in the label, if the label is selectable. See Label.setSelectable. If the label is not selectable, this function has no effect. If start_offset or end_offset are -1, then the end of the label will be substituted.
start offset (in characters not bytes)
end offset (in characters not bytes)
Selects a range of characters in the label, if the label is selectable. See Label.setSelectable. If the label is not selectable, this function has no effect. If start_offset or end_offset are -1, then the end of the label will be substituted.