code: public com.google.api.Distribution.Range getRange() {
      return range_ == null ? com.google.api.Distribution.Range.getDefaultInstance() : range_;
    }
docs: <pre>
  If specified, contains the range of the population values. The field
  must not be present if the `count` is zero.
  </pre>
  
  <code>.google.api.Distribution.Range range = 4;</code>