#' @section Output:
#' If there are no results, then this function will return a vector of
#' length 0 (\code{vector()}).
#'
#' @return if results are atomic with same type and dimensionality, a
#' vector, matrix or array; otherwise, a list-array (a list with
#' dimensions)
#' @param .drop should extra dimensions of length 1 in the output be
#' dropped, simplifying the output. Defaults to \code{TRUE}
#' @family array output
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