You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: space_view_class.rs
    path of file: ./repos/rerun/crates/re_space_view_dataframe/src
    
    the code of the file until where you have to start completion: use std::collections::BTreeSet;

use egui_extras::Column;

use re_da
    
    fn help_text(&self, _re_ui: &re_ui::ReUi) -> egui::WidgetText {
        "Show the data contained in entities in a table.\n\n\
        Each entity is represented by as many rows as it has instances. This includes out-of-bound \
        instances—instances from secondary components that cannot be joined to the primary \
        component—that are typically not represented in other space views. Also, splats are merged \
        into the entity's instance."
            .into()
    }