func (c *Context) Err() error {
	return c.context.Err()
}
Err returns the current error.

Err is concurrent-safe.
package oto
import (
	"io"
)
type Context struct {
	context *context
}
func (c *Context) NewPlayer(r io.Reader) Player {
	return c.context.NewPlayer(r)
}
func (c *Context) Suspend() error {
	return c.context.Suspend()
}
func (c *Context) Resume() error {
	return c.context.Resume()
}