Error.this
this
(string msg, Throwable nextInChain = null) @nogc @safe pure nothrowCreates a new instance of Error. The nextInChain parameter is used internally and should always be null when passed by user code. This constructor does not automatically throw the newly-created Error; the throw statement should be used for that purpose.
this
(string msg, string file, size_t line, Throwable nextInChain = null) @nogc @safe pure nothrowNo documentation available for this declaration.