The inductor is not a filter but actually part of the switching system.
I may not have stated my observance well enough. The datasheet for the switching regulator shows the use of just one inductor. The actual board I have in my hands has two inductions, the larger main inductor and a second smaller one that along with a small capacitor forms an additional low pass filter right at the DC output terminals.
Sorry there is no schematic from the vendor for the board to post here, but as best as I can determine it follows the datasheet application example except for the additional LC filter on the output.