Change the retention times in a Spectra object based on a PredRet model
predret_project_DB.RdThis function uses a PredRet model that describe the relationship between between two chromatographic systems to change the retention time in the database/Spectra() object.
Note that the order of the systems mattter. The first system should be the system to translate the RT from and the second system should be the system to translate RTs to.