func OptFile(f string) Option {
	return func(rm *ReadManager) error {
		rm.file = f
		return nil
	}
}
OptFile sets the filename to read.
package reader
import (
	"context"
	"fmt"
	"net/http"
	"time"
)
type Option func(*ReadManager) error
func OptLines(n int) Option {
	return func(rm *ReadManager) error {
		rm.readLimit = n
		return nil
	}
}
func OptSkip(n int) Option {
	return func(rm *ReadManager) error {
		rm.skip = n
		return nil
	}
}