79     std::stringstream ss;  in toString()  local
81     ss << kVersion << "," << mBinSize << "," << mNumBins << "," << mLow << ",{";  in toString()
86                 ss << ",";  in toString()
88             ss << static_cast<int>(i) - 1 << kDivider << mBins[i];  in toString()
92     ss << "}";  in toString()
94     return ss.str();  in toString()
118     std::stringstream ss;  in asciiArtString()  local
133         ss << std::setw(indent + kMaxNumberWidth);  in asciiArtString()
135             ss << "<";  in asciiArtString()
137             ss << ">";  in asciiArtString()
139             ss << mLow + (bin - 1) * mBinSize;  in asciiArtString()
141         ss << " |";  in asciiArtString()
146             ss << getTail(increments * kMarkersPerIncrement, kMarkers);  in asciiArtString()
148         ss << getTail((maxIncrements - increments + 1) * kMarkersPerIncrement, kSpaces)  in asciiArtString()
151     ss << "\n";  in asciiArtString()
153     return ss.str();  in asciiArtString()