code: function _unsqueeze (array, dims, dim) {
    let i, ii
  
    if (Array.isArray(array)) {
      const next = dim + 1
      for (i = 0, ii = array.length; i < ii; i++) {
        array[i] = _unsqueeze(array[i], dims, next)
      }
    } else {
      for (let d = dim; d < dims; d++) {
        array = [array]
      }
    }
  
    return array
  }
docs: Recursively unsqueeze a multi dimensional array
  @param {Array} array
  @param {number} dims Required number of dimensions
  @param {number} dim  Current dimension
  @returns {Array | *} Returns the squeezed array
  @private