RequestContext.reportProgress

Integer-step convenience over `reportProgress(double, Nullable!double, string): a step counter passes done/total` directly without cast(double) and constructing a Nullable!double total.

void reportProgress(double progress, Nullable!double total, string message)
void reportProgress(long done, long total, string message)
interface RequestContext
final @safe
void
reportProgress
(
long done
,
long total
,
string message = null
)