Calculate estimations of input file sizes for disk usage approximation.

    These are current dominated by fastq/BAM sizes, so estimate based on that.

def _calc_input_estimates(keyvals, get_retriever):
    """Calculate estimations of input file sizes for disk usage approximation.

    These are current dominated by fastq/BAM sizes, so estimate based on that.
    """
    out = {}
    for key, val in keyvals.items():
        size = _calc_file_size(val, 0, get_retriever)
        if size:
            out[key] = size
    return out