how to pass multimap variable to a named workflow?

[complexgenome]

Hi there,

I have a main.nf, that calls workflows based on user provided input. Each workflow then has a set of processes/modules that are executed.
I'd like to know how to pass a multi-map variable to a workflow.
I've structure as:

$ tree workflows/

workflows/
├── rna.nf
└── wes.nf

$tree modules/

modules/
└── fastp_wes.nf

I've a main.nf as:

include { rna  } from './workflows/rna'
include { wes } from './workflows/wes'

workflow {
    if (params.analysis=="both"){
        wes()
        rna() 
    }
    if (params.analysis=="wes"){
        wes()        
    }
    
    if (params.analysis=="rna"){
        rna()
 
    }
}

Inside wes and RNA I'm repeating split csv file code:
wes.nf

workflow wes {

def csvFile = params.input_csvFile

Channel.fromPath( csvFile )
        .splitCsv( )
                .multiMap { row ->
                def rna_reads=tuple(file(row[5]), file(row[6]))
            def tumor_reads = tuple( file( row[3]) ,file(row[4]))
            def normal_reads = tuple(file(row[1]),file(row[2]) )
            
            tumor:
                 tuple( row[0], tumor_reads )
            normal:
                 tuple( row[0], normal_reads )
                rna:
                tuple(row[0],rna_reads)
        }.set{samples}

samples.tumor.view { "tumor $it" }
samples.normal.view { "normal $it" }
samples.rna.view { "rna $it" }

  println "we are in wes"
    fastp().view()

}

I've rna.nf as

workflow rna {

def csvFile = params.input_csvFile
Channel.fromPath( csvFile )
        .splitCsv( )
                .multiMap { row ->
                def rna_reads=tuple(file(row[5]), file(row[6]))
            def tumor_reads = tuple( file( row[3]) ,file(row[4]))
            def normal_reads = tuple(file(row[1]),file(row[2]) )
            
            tumor:
                 tuple( row[0], tumor_reads )
            normal:
                 tuple( row[0], normal_reads )
                rna:
                tuple(row[0],rna_reads)
        }.set{samples}

samples.tumor.view { "tumor $it" }
samples.normal.view { "normal $it" }
samples.rna.view { "rna $it" }

    println "we are good in rna"

}

At the. moment I have redundant code in WES and RNA workflow to read a CSV file and store.
How can I pass samples multi map to any workflow?

I tried to pass multi map variable but don't know, it didn't work; I accepted in input code block.

Any help would be appreciated.