This program is free software: you can redistribute it and/or 
modify it under the terms of the GNU Lesser General 
Public License as published by the Free Software Foundation, 
either version 3 of the License, or (at your option) 
any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied 
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public 
License along with this program. 
If not, see <https://www.gnu.org/licenses/>.