The ghost probability (Tr/TrackTools//TrackNNGhostId. and Tr/TrackTools//Run2GhostId.) use(d) the 1D tabulated function from RichDet which is being replaced (cf !394 (merged) and LHCb!451 (merged)). As a temporary workaround, the old Rich1DTabFunc was placed in Tr/TrackKernel under the name Track1DTabFunc but large parts of its functionality are not needed for the ghost probability. Here a standalone implementation of a 1dimensional tabulated function for the ghost probability, taking into account that (from run2 onwards) the tabulation binning is equidistant in y [sic].