Function layout_page 

pub async fn layout_page(
    file: PathBuf,
    sheet: String,
    range: Option<String>,
    mode: Option<LayoutModeArg>,
    max_col_width: Option<u32>,
    fit_columns: bool,
    skip_empty_columns_trim: bool,
    render: Option<LayoutRenderArg>,
) -> Result<Value>