chainQuiver -- make a toric quiver on underlying graph in the form of a chain

i1 : Q = chainQuiver {1,2,3}

o1 = ToricQuiver{flow => {1, 1, 1, 1, 1, 1}                            }
                 IncidenceMatrix => | -1 0  0  0  0  0  |
                                    | 1  -1 -1 0  0  0  |
                                    | 0  1  1  -1 -1 -1 |
                                    | 0  0  0  1  1  1  |
                 Q0 => {0, 1, 2, 3}
                 Q1 => {{0, 1}, {1, 2}, {1, 2}, {2, 3}, {2, 3}, {2, 3}}
                 weights => {-1, -1, -1, 3}

o1 : ToricQuiver

i2 : Q = chainQuiver ({1,2,3}, Flow=>"Random")

o2 = ToricQuiver{flow => {24, 65, 71, 72, 19, 19}                      }
                 IncidenceMatrix => | -1 0  0  0  0  0  |
                                    | 1  -1 -1 0  0  0  |
                                    | 0  1  1  -1 -1 -1 |
                                    | 0  0  0  1  1  1  |
                 Q0 => {0, 1, 2, 3}
                 Q1 => {{0, 1}, {1, 2}, {1, 2}, {2, 3}, {2, 3}, {2, 3}}
                 weights => {-24, -112, 26, 110}

o2 : ToricQuiver

i3 : Q = chainQuiver ({1,2,3}, Flow=>{1, 2, 1, 3, 1, 4})

o3 = ToricQuiver{flow => {1, 2, 1, 3, 1, 4}                            }
                 IncidenceMatrix => | -1 0  0  0  0  0  |
                                    | 1  -1 -1 0  0  0  |
                                    | 0  1  1  -1 -1 -1 |
                                    | 0  0  0  1  1  1  |
                 Q0 => {0, 1, 2, 3}
                 Q1 => {{0, 1}, {1, 2}, {1, 2}, {2, 3}, {2, 3}, {2, 3}}
                 weights => {-1, -2, -5, 8}

o3 : ToricQuiver