/// Trait to convert any type to a "String" primary key.
////// Implemented by default for any T that can be converted to a string
/// using [`std::string::ToString`].
pubtraitToPrimaryKey{/// Converts the struct to a string for usage as a primary key in a data store.
fnto_primary_key(&self)-> String;}impl<T> ToPrimaryKey forTwhere
T:std::string::ToString,
{fnto_primary_key(&self)-> String{self.to_string()}}