Function render_add_foreign_key_clause 

pub fn render_add_foreign_key_clause<D: AdapterDialect>(
    table_name: &str,
    columns: &[String],
    referenced_table: &str,
    referenced_columns: &[String],
    on_delete: Option<&'static str>,
    on_update: Option<&'static str>,
    constraint_name: &str,
    dialect: &D,
) -> String