Function install 

pub fn install(config: LoggerConfig) -> Result<(), InstallError>

Installs the SDK logger as the global log implementation.

Called by the enable_logger! and enable_logger_with! macros; rarely invoked directly. Prefer the macros — they capture the caller’s CARGO_PKG_NAME for the default prefix and filename.

Errors

• InstallError::AlreadyInstalled if a logger (this one or any other) was already registered with the log crate in this process.
• InstallError::Io if the log directory or file could not be opened.