process {

    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }

    withName: GATK4_VARIANTFILTRATION {
        ext.args = "--filter-name \'test_filter\' --filter-expression \'MQ0 > 0\'"
        ext.prefix = { "${meta.id}.filtered" }
    }

}