     this.numerics[numericName] = MemoryAllocatorDump.aggregateNumerics(
            this.children.map(function(child) {
              return child.numerics[numericName];
            }), opt_model);
      }, this);
    }
  };

  // TODO(petrcermak): Consider moving this to tr.v.Histogram.
  MemoryAllocatorDump.aggregateNumerics = function(numerics, opt_model) {
    let shouldLogWarning = !!opt_model;
    let aggregatedUnit = undefined;
    let aggregatedValue = 0;

    // Aggregate the units and sum up the 