Source in this directory is borrowed from  [Flutter SDK](https://github.com/flutter/flutter). Some of the bits are modified/tailored to needs of this project.

### License - Flutter 
> Copyright 2014 The Flutter Authors. All rights reserved.
> 
> Redistribution and use in source and binary forms, with or without modification,
> are permitted provided that the following conditions are met:
> 
>     * Redistributions of source code must retain the above copyright
>       notice, this list of conditions and the following disclaimer.
>     * Redistributions in binary form must reproduce the above
>       copyright notice, this list of conditions and the following
>       disclaimer in the documentation and/or other materials provided
>       with the distribution.
>     * Neither the name of Google Inc. nor the names of its
>       contributors may be used to endorse or promote products derived
>       from this software without specific prior written permission.
> 
> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
> ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
> WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
> DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
> ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
> (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
> LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
> ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
