public static long millisToNanos(long millis) {
    return millis * NANOS_PER_MILLISECOND;
  }
Converts milliseconds to nanoseconds by multiplying millis by {@link #NANOS_PER_MILLISECOND}.

@param millis value in milliseconds
@return value converted to nanoseconds
geode-core/src/main/java/org/apache/geode/internal/NanoTimer.java