Can we see the definition for out of the box method SearchCentralAccount

Hi All,  

We are facing issue because of the wrong calculation of CentralAccount of users. Suffix is getting added to user's centralaccount even though same centralaccount doesn't seem to be assigned to any other user.

We can see that an OOTB method 'SearchCentralAccount' is used in the scripts to search the centralaccounts.

Is it possible to find the definition of this method? We want to check which tables are actually checked in this method.

Thanks and regards,

Somee