for loop - Initialize list of lists in Dart -

i have grid in dart implemented follows:

class cell {     int row;      int col;     cell(this.row, this.col); }  class grid {     list<list<cell>> rows = new list(grid_size);     grid() {         rows.fillrange(0, rows.length, new list(grid_size));     } } 

and can't seem find way initialize each cell proper row , col values: tried 2 nested loops, this

for(int = 0; < grid_size; i++) {     for(int j = 0; j < grid_size; j++) {         rows[i][j] = new cell(i, j);     } } 

but due dart's closure error protection described here, grid ends being populated cells having grid_size - 1 in row member.

so, what's idiomatic way in dart initialize nested list?

i guess want:

class grid {     list<list<cell>> rows; // = new list(grid_size);     grid() {         rows = new list.generate(grid_size, (i) =>                 new list.generate(grid_size, (j) => new cell(i, j)));     } } 

see dart: list of lists