Due to the absence of a strong electron-acoustic phonon interaction, a system made up of graphene sheets encapsulated between thin hexagonal boron nitride slabs is ideal for investigating the hydrodynamic behavior of an electron liquid. Using a fully analytical theoretical approach, the authors demonstrate that nonlocal dc transport measurements can be used to extract the hydrodynamic shear viscosity of 2D electrons in graphene far from the neutrality point. They also suggest that the currently