* The data directory is determined as follows:
* If u_setDataDirectory() has been called, that is it, otherwise
* if the ICU_DATA environment variable is set, use that, otherwise
* The data directory is determined as follows:
* If u_setDataDirectory() has been called, that is it, otherwise
* if the ICU_DATA environment variable is set, use that, otherwise
#ifndef U_HIDE_INTERNAL_API
/**
* Return the time zone files override directory, or an empty string if
#ifndef U_HIDE_INTERNAL_API
/**
* Return the time zone files override directory, or an empty string if