* A 'safe' value skips the merge if there are any un-resolved conflicts.
* Does a force merge otherwise.
* @param boolean $autoFlip wether to let api decide which contact to retain and which to delete.
* A 'safe' value skips the merge if there are any un-resolved conflicts.
* Does a force merge otherwise.
* @param boolean $autoFlip wether to let api decide which contact to retain and which to delete.