var groupedByFilterId: any = _.groupBy(filterObject, 'questionId');
			//iterate all the questions that the user wanted to filter by
			let obj = undefined;
			let index = 0;
			for (var filterArr of Object.keys(groupedByFilterId)) {

				let innerIndex = 0;
				for (var currentFilter of groupedByFilterId[filterArr]) {
					let insertSession = true;
					//get question id and answer by id
					let responses = _.groupBy(session.responses, "question_id");
					//checks if there is an answer of the current filter question
					if (!responses[currentFilter.questionId]) {
						insertSession = false;
						// break; //means the user didn't answer this question in the current session
					}
					let currentAnswer: any = responses[currentFilter.questionId][0];
					//check if the current session is true for each of the filters questions
					if (!currentAnswer || currentAnswer && currentAnswer.answer.value != currentFilter.value) {
						//if one is false -> break
						insertSession = false;
						// break;
					}//else means its true
					if (insertSession) {
						obj = session;
						// arrayOfFilterSessions.push(session);
						// break;
					}
					if (groupedByFilterId[filterArr].length - 1 === innerIndex && insertSession === false) {
						obj = undefined;
					}
					innerIndex++;
				}
				if (index === Object.keys(groupedByFilterId).length-1 && obj!=undefined) {
					arrayOfFilterSessions.push(obj);

				}
				index++;



			}