pub const log_level_debug: Int

pub const log_level_error: Int

pub const log_level_fatal: Int

pub const log_level_info: Int

pub const log_level_warn: Int

pub fn debug(logger: Logger, value: a) -> a

pub fn error(logger: Logger, value: String) -> String

pub fn fatal(logger: Logger, value: String) -> String

pub fn info(logger: Logger, value: String) -> String

pub fn new_logger() -> Logger

pub fn warn(logger: Logger, value: String) -> String