fnExtractText = function (oItem) {
				if (!oItem) {
					return "";
				}
				return bHasTabularSuggestions ? oInput._getRowResultFunction()(oItem) : oItem.getText();
			}
Handles Input's specific type ahead logic.

@param {sap.m.Input} oInput Input's instance to which the type ahead would be applied. For example: this OR Dialog's Input instance.
@returns {null|object} Map object containing type-ahead info or null if no type-ahead is performed.
@private