src/LogManager.php
public function trace( string $file, int $line, string $target, string $message, string $tag = NULL )
    {
        self::log( $file, $line, "T:$target", $message, $tag );
    }
public function trace( string $file, int $line, string $target, string $message, string $tag = NULL )
    {
        self::log( $file, $line, "T:$target", $message, $tag );
    }
public function trace ( string $ file , int $ line , string $ target , string $ message , string $ tag = NULL ) { self :: log ( $ file , $ line , "T:$target" , $ message , $ tag ) ; }
write trace log

@param string $file     file path
@param int $line        line of file
@param string $target     log target
@param string $message    log message to write
@param string $tag        tag string(optional)
write trace log