func (f *Field) flushableLine(j int) bool {
	for i := 0; i < fieldBlockNumX; i++ {
		if f.blocks[i][j] == BlockTypeNone {
			return false
		}
	}
	return true
}
func (f *Field) flushableLine(j int) bool {
	for i := 0; i < fieldBlockNumX; i++ {
		if f.blocks[i][j] == BlockTypeNone {
			return false
		}
	}
	return true
}
func ( f * Field ) flushableLine ( j int ) bool { for i := 0 ; i < fieldBlockNumX ; i ++ { if f . blocks [ i ] [ j ] == BlockTypeNone { return false } } return true }
// flushableLine returns a boolean value indicating whether
// the line j is flushabled or not.
flushableLine returns a boolean value indicating whether the line j is flushabled or not .