|  | ◆ mobilebackup2_version_exchange()
Performs the mobilebackup2 protocol version exchange.  Parameters
  
    | client | The MobileBackup client to use. |  | local_versions | An array of supported versions to send to the remote. |  | count | The number of items in local_versions. |  | remote_version | Holds the protocol version of the remote on success. | 
 ReturnsMOBILEBACKUP2_E_SUCCESS on success, or a MOBILEBACKUP2_E_* error code otherwise. 
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