code: function SourceNodeMock(line, column, filename, chunk) {
          var result = [];
  
          function flatten(input) {
              var i, iz;
              if (isArray(input)) {
                  for (i = 0, iz = input.length; i < iz; ++i) {
                      flatten(input[i]);
                  }
              } else if (input instanceof SourceNodeMock) {
                  result.push(input);
              } else if (typeof input === 'string' && input) {
                  result.push(input);
              }
          }
  
          flatten(chunk);
          this.children = result;
      }
docs: Fallback for the non SourceMap environment