I have some data that is an array of objects like so:

let employees = 
[
    {
        emp_id: "1",
        course_data : [
            {
                info: "info",
                for: "emp_id_1"
            },
            {
                info: "more_info",
                for: "emp_id_1 "
            },
            {
                info: "even_more_info",
                for: "emp_id_1 "
            },

        ],

        emp_id: "2",
        course_data : [
            {
                info: "info",
                for: "emp_id_2"
            },
            {
                info: "more_info",
                for: "emp_id_2 "
            },
            {
                info: "even_more_info",
                for: "emp_id_2 "
            },

        ],
    },
];

I want to create a conatenated array of objects from the course_data property all objects in the parent array have. In other words, I'd like to have my data in the following format so that I can run _.groupBy() on the it:

let concatenated_array = [
            {
                info: "info",
                for: "emp_id_1"
            },
            {
                info: "more_info",
                for: "emp_id_1 "
            },
            {
                info: "even_more_info",
                for: "emp_id_1 "
            },

            {
                info: "info",
                for: "emp_id_2"
            },
            {
                info: "more_info",
                for: "emp_id_2 "
            },
            {
                info: "even_more_info",
                for: "emp_id_2 "
            },

        ]

I'm thinking something like unionWith, but I'm not sure. Is this possible in lodash?