Channel broken mental model example.

[mahesh-panchal]

I saw some people do this in the nf-core hackathon today.

This is valid syntax, but doesn't combine input as wanted, which some have tried to use:

workflow {

     input = [
        [ id: "test", single_end: false  ], 
        [ file('SRA_test_1.fastq.gz'), file('SRA_test_2.fastq.gz') ]
     ]
     FOO(input)

      next_input = [
          [ id: "test", single_end: false ],
          FOO.out          // This is invalid. Channels and data can not be combined like this.
      ]
      BAR(next_input)
}