Throwable.chainTogether

Throwable chainTogether(return scope Throwable e1, return scope Throwable e2) @__future @system @nogc pure nothrow

Append e2 to chain of exceptions that starts with e1.

`e1`	start of chain (can be null)
`e2`	second part of chain (can be null)

Throwable that is at the start of the chain; null if both e1 and e2 are null