How to use the datasette.utils.detect_fts function in datasette

CREATE TABLE "Street_Tree_List" (
      "TreeID" INTEGER,
      "qSpecies" TEXT,
      "qAddress" TEXT,
      "SiteOrder" INTEGER,
      "qSiteInfo" TEXT,
      "PlantType" TEXT,
      "qCaretaker" TEXT
    );
    CREATE VIEW Test_View AS SELECT * FROM Dumb_Table;
    CREATE VIRTUAL TABLE "Street_Tree_List_fts" USING FTS4 ("qAddress", "qCaretaker", "qSpecies", content="Street_Tree_List");
    CREATE VIRTUAL TABLE r USING rtree(a, b, c);
    """
    conn = utils.sqlite3.connect(":memory:")
    conn.executescript(sql)
    assert None is utils.detect_fts(conn, "Dumb_Table")
    assert None is utils.detect_fts(conn, "Test_View")
    assert None is utils.detect_fts(conn, "r")
    assert "Street_Tree_List_fts" == utils.detect_fts(conn, "Street_Tree_List")

"qAddress" TEXT,
      "SiteOrder" INTEGER,
      "qSiteInfo" TEXT,
      "PlantType" TEXT,
      "qCaretaker" TEXT
    );
    CREATE VIEW Test_View AS SELECT * FROM Dumb_Table;
    CREATE VIRTUAL TABLE "Street_Tree_List_fts" USING FTS4 ("qAddress", "qCaretaker", "qSpecies", content="Street_Tree_List");
    CREATE VIRTUAL TABLE r USING rtree(a, b, c);
    """
    conn = utils.sqlite3.connect(":memory:")
    conn.executescript(sql)
    assert None is utils.detect_fts(conn, "Dumb_Table")
    assert None is utils.detect_fts(conn, "Test_View")
    assert None is utils.detect_fts(conn, "r")
    assert "Street_Tree_List_fts" == utils.detect_fts(conn, "Street_Tree_List")

"TreeID" INTEGER,
      "qSpecies" TEXT,
      "qAddress" TEXT,
      "SiteOrder" INTEGER,
      "qSiteInfo" TEXT,
      "PlantType" TEXT,
      "qCaretaker" TEXT
    );
    CREATE VIEW Test_View AS SELECT * FROM Dumb_Table;
    CREATE VIRTUAL TABLE "Street_Tree_List_fts" USING FTS4 ("qAddress", "qCaretaker", "qSpecies", content="Street_Tree_List");
    CREATE VIRTUAL TABLE r USING rtree(a, b, c);
    """
    conn = utils.sqlite3.connect(":memory:")
    conn.executescript(sql)
    assert None is utils.detect_fts(conn, "Dumb_Table")
    assert None is utils.detect_fts(conn, "Test_View")
    assert None is utils.detect_fts(conn, "r")
    assert "Street_Tree_List_fts" == utils.detect_fts(conn, "Street_Tree_List")

"qSpecies" TEXT,
      "qAddress" TEXT,
      "SiteOrder" INTEGER,
      "qSiteInfo" TEXT,
      "PlantType" TEXT,
      "qCaretaker" TEXT
    );
    CREATE VIEW Test_View AS SELECT * FROM Dumb_Table;
    CREATE VIRTUAL TABLE "Street_Tree_List_fts" USING FTS4 ("qAddress", "qCaretaker", "qSpecies", content="Street_Tree_List");
    CREATE VIRTUAL TABLE r USING rtree(a, b, c);
    """
    conn = utils.sqlite3.connect(":memory:")
    conn.executescript(sql)
    assert None is utils.detect_fts(conn, "Dumb_Table")
    assert None is utils.detect_fts(conn, "Test_View")
    assert None is utils.detect_fts(conn, "r")
    assert "Street_Tree_List_fts" == utils.detect_fts(conn, "Street_Tree_List")

            lambda conn: detect_fts(conn, table)
        )

"select count(*) from {}".format(escape_sqlite(table))
            ).fetchone()[0]
        except sqlite3.OperationalError:
            # This can happen when running against a FTS virtual table
            # e.g. "select count(*) from some_fts;"
            count = 0

        column_names = table_columns(conn, table)

        tables[table] = {
            "name": table,
            "columns": column_names,
            "primary_keys": detect_primary_keys(conn, table),
            "count": count,
            "hidden": table_metadata.get("hidden") or False,
            "fts_table": detect_fts(conn, table),
        }

    foreign_keys = get_all_foreign_keys(conn)
    for table, info in foreign_keys.items():
        tables[table]["foreign_keys"] = info

    # Mark tables 'hidden' if they relate to FTS virtual tables
    hidden_tables = [
        r["name"]
        for r in conn.execute(
            """
                select name from sqlite_master
                where rootpage = 0
                and sql like '%VIRTUAL TABLE%USING FTS%'
            """
        )