function _importMessage(oMessage) {
		var oProcessor = oMessage.getMessageProcessor(),
			sProcessorId = oProcessor && oProcessor.getId(),
			aTargets = oMessage.getTargets();

		if (!mAllMessages[sProcessorId]) {
			mAllMessages[sProcessorId] = {};
		}
		if (!aTargets.length) { // unbound message => add it to undefined entry
			aTargets = [undefined];
		}
		aTargets.forEach(function (sTarget) {
			var aMessages = mAllMessages[sProcessorId][sTarget] ? mAllMessages[sProcessorId][sTarget] : [];
			aMessages.push(oMessage);
			mAllMessages[sProcessorId][sTarget] = aMessages;
		});
	}
import message to internal map of messages
@param {sap.ui.core.message.Message} oMessage The Message to import
@private