I use exterior grade latex sub-floor adhesive on the row closest to cabinets. When it is in place shims made from lengths of flooring are pressed into place between the bottom of the cabinet and the flooring until the glue sets up. If you do get a flood or long term leak the sub-floor will let go of the flooring so if you need to replace the flooring the glue comes out along with the board. You can still leave some expansion gap where the flooring meets the toe kick which will be covered by the cabinet material which is usually quarter inch ply, these days. If you want more gap install some extra plywood first to shim out the toe kick. If the toe kick is already installed, base shoe would be the solution, not quarter round.
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