code: public JsCodeBuilder addChunksToOutputVar(List<? extends Expression> codeChunks) {
      if (currOutputVarIsInited) {
        Expression rhs = CodeChunkUtils.concatChunks(codeChunks);
        rhs.collectRequires(requireCollector);
        appendLine(currOutputVar.plusEquals(rhs).getCode());
      } else {
        Expression rhs = CodeChunkUtils.concatChunksForceString(codeChunks);
        rhs.collectRequires(requireCollector);
        append(
            VariableDeclaration.builder(currOutputVar.singleExprOrName().getText())
                .setRhs(rhs)
                .build());
        setOutputVarInited();
      }
      return this;
    }
docs: Appends one or more lines representing the concatenation of the values of the given code chunks
  saved to the current output variable.