def default_populate_initial_workspace(initial_workspace, root_mask_term,
    execution_plan, dates, assets):
    """The default implementation for ``populate_initial_workspace``. This
    function returns the ``initial_workspace`` argument without making any
    modifications.

    Parameters
    ----------
    initial_workspace : dict[array-like]
        The initial workspace before we have populated it with any cached
        terms.
    root_mask_term : Term
        The root mask term, normally ``AssetExists()``. This is needed to
        compute the dates for individual terms.
    execution_plan : ExecutionPlan
        The execution plan for the pipeline being run.
    dates : pd.DatetimeIndex
        All of the dates being requested in this pipeline run including
        the extra dates for look back windows.
    assets : pd.Int64Index
        All of the assets that exist for the window being computed.

    Returns
    -------
    populated_initial_workspace : dict[term, array-like]
        The workspace to begin computations with.
    """
    return initial_workspace
