code: void add(Mapping aMapping) {
          if (generatedPositionAfter(this._last, aMapping)) {
              this._last = aMapping;
              this._array.add(aMapping);
          } else {
              this._sorted = false;
              this._array.add(aMapping);
          }
      }
docs: Add the given source mapping.
  
  @param Object
  aMapping