classDiagram
    %%
    %% nextflow.extension
    %%
    direction LR

    ChannelEx --> DumpOp : dump
    Nextflow --> GroupKey : groupKey

    OperatorImpl --> BranchOp : branch
    OperatorImpl --> BufferOp : buffer
    OperatorImpl --> CollectFileOp : collectFile
    OperatorImpl --> CollectOp : collect
    OperatorImpl --> CombineOp : combine
    OperatorImpl --> ConcatOp : concat
    OperatorImpl --> CrossOp : cross
    OperatorImpl --> GroupTupleOp : groupTuple
    OperatorImpl --> JoinOp : join
    OperatorImpl --> MapOp : map
    OperatorImpl --> MergeOp : merge
    OperatorImpl --> MixOp : mix
    OperatorImpl --> MultiMapOp : multiMap
    OperatorImpl --> RandomSampleOp : randomSample
    OperatorImpl --> SplitOp : splitCsv, splitFasta, splitFastq, splitText
    OperatorImpl --> TakeOp : take
    OperatorImpl --> ToListOp : toList, toSortedList
    OperatorImpl --> TransposeOp : transpose
    OperatorImpl --> UntilOp : until

    WorkflowBinding --> OpCall : invokeMethod