public void updateWorkflowDefs(List<WorkflowDef> workflowDefs) {
        Preconditions.checkNotNull(workflowDefs, "Workflow defs list cannot be null");
        stub.updateWorkflows(
                MetadataServicePb.UpdateWorkflowsRequest.newBuilder()
                        .addAllDefs(workflowDefs.stream().map(protoMapper::toProto)::iterator)
                        .build());
    }
Updates a list of existing workflow definitions

@param workflowDefs List of workflow definitions to be updated
grpc-client/src/main/java/com/netflix/conductor/client/grpc/MetadataClient.java