Reducing visual clutter.

[Nicholas Wilson via Digitalmars-d-learn]

so I have

```
struct Pipeline
{
      // some fields.
     ref typeof(this) invoke(alias kernel)(TransformArgsOf!kernel 
args)
     {
         //...
         return this;
     }
}
```

and it will be used like

```
void fun1(int a) {}
void fun2(double b) {}
void funn(ulong c) {}
//...
auto pipe = Pipeline(...);
pipe.invoke!fun1(42)
     .invoke!fun2(3.14)
     .invoke!funn(1u)
     //...
     ;
```

is there anyway to reduce the visual noise of the `invoke`?

I was thinking of trying to (ab)use opDispatch + mixins that 
returns a callable whose opCall returns the Pipeline by ref. I'm 
not sure how well that would go given I need `kernel.mangleof`, 
`typeof(kernel)` and `Parameters!kernel`.

Is there a nicer way to achieve this? Or is this shenanigans not 
worth it?