int linphone_core_transfer_call(LinphoneCore *lc, LinphoneCall *call, const char *refer_to);
+int linphone_core_transfer_call_to_another(LinphoneCore *lc, LinphoneCall *call, LinphoneCall *dest);
+
bool_t linphone_core_inc_invite_pending(LinphoneCore*lc);
bool_t linphone_core_in_call(const LinphoneCore *lc);