text: value with a new line.For example, if you wanted to join sentence1 and sentence2 with a space instead of a new line, you could set content_columns_joiner like so:RocksetLoader(    RocksetClient(Regions.usw2a1, "<api key>"),    models.QueryRequestSql(query="SELECT * FROM langchain_demo LIMIT 1 WHERE id=38"),    ["sentence1", "sentence2"],    content_columns_joiner=lambda docs: " ".join(        [doc[1] for doc in docs]    ),  # join with space instead of /n)The page_content of the resulting Document would be:This is the first sentence. This is the second sentence.Oftentimes you want to include the column name in the page_content. You can do that like this:RocksetLoader(    RocksetClient(Regions.usw2a1, "<api key>"),    models.QueryRequestSql(query="SELECT * FROM langchain_demo LIMIT 1 WHERE id=38"),    ["sentence1", "sentence2"],    content_columns_joiner=lambda docs: "\n".join(        [f"{doc[0]}: {doc[1]}" for doc in docs]    ),)This would result in the following page_content:sentence1: This is the first sentence.sentence2: This is the second sentence.PreviousRoamNextRSTSetting up the environmentUsing multiple columns as contentCommunityDiscordTwitterGitHubPythonJS/TSMoreHomepageBlogCopyright Â© 2023 LangChain, Inc.