Triangle $ABC$ and triangle $DEF$ are shown. The relationship between the side lengths of the two triangles is such that $\frac{AB}{DE}=\frac{BC}{EF}=\frac{CA}{FD}=2$. If the measure of angle $ABC$ is $70^{\circ }$, what is the measure, in degrees, of angle $DEF$? (Disregard the degree symbol when gridding your answer.)