func GetSystemInfo() (*SystemInfo, error) {
	return nil, nil
}
GetSystemInfo returns system info
package system
import (
	"time"
)
func GetUptime() (uint64, error) {
	return 0, nil
}
func GetLA() (*LoadAvg, error) {
	return nil, nil
}
func GetMemUsage() (*MemUsage, error) {
	return nil, nil
}
func GetCPUUsage(duration time.Duration) (*CPUUsage, error) {
	return nil, nil
}
func CalculateCPUUsage(c1, c2 *CPUStats) *CPUUsage {
	return nil
}
func GetCPUStats() (*CPUStats, error) {
	return nil, nil
}
func GetCPUInfo() ([]*CPUInfo, error) {
	return nil, nil
}
func GetFSUsage() (map[string]*FSUsage, error) {
	return map[string]*FSUsage{"/": {}}, nil
}
func GetIOStats() (map[string]*IOStats, error) {
	return map[string]*IOStats{"/dev/sda1": {}}, nil
}