kFloatingActionButtonMargin top-level constant
          
          double
          const kFloatingActionButtonMargin
          
        
        
The margin that a FloatingActionButton should leave between it and the edge of the screen.
FloatingActionButtonLocation.endFloat uses this to set the appropriate margin between the FloatingActionButton and the end of the screen.
Implementation
const double kFloatingActionButtonMargin = 16.0;