EdgeInsets.symmetric constructor

const EdgeInsets.symmetric({
  1. double vertical = 0.0,
  2. double horizontal = 0.0,
})

Creates insets with symmetrical vertical and horizontal offsets.

Eight pixel margin above and below, no horizontal margins:
link 
const EdgeInsets.symmetric(vertical: 8.0)

Implementation

const EdgeInsets.symmetric({double vertical = 0.0, double horizontal = 0.0})
  : left = horizontal,
    top = vertical,
    right = horizontal,
    bottom = vertical;