How to use the flying-squid.findPotentialLines function in flying-squid

it("detect potential first lines from right bottom", async function() {
          let potentialLines=await findPotentialLines(world,right[0],direction.scaled(-1));
          assert.include(potentialLines,{
              "direction": new Vec3(0,1,0),
              "line": right
            });
        });
      });

it("detect potential first lines from left top", async function() {
          let potentialLines=await findPotentialLines(world,left[left.length-1],direction);
          assert.include(potentialLines,{
              "direction": new Vec3(0,1,0),
              "line": left
            });
        });

it("detect potential first lines from top left", async function() {
          let potentialLines=await findPotentialLines(world,top[0],new Vec3(0,-1,0));
          assert.include(potentialLines,{
              "direction": direction,
              "line": top
            });
        });