Example of initializing and sharing package scoped variable

example.go

// This package shows a non-concurrent safe way to initialize and
// share a package scoped variable.

package example

// package scoped variable initialized in GetClient().
// its type is not important
var pkgScopedVar []byte

// Client is used for its methods
type Client struct{}

// GetClient initializes pkgScopedVar
func GetClient() (c Client) {
	pkgScopedVar = make([]byte, 10) // For Example

	return
}

// Example method needs pkgScopedVar
func (c Client) Example() {
	_ = pkgScopedVar[:5] // example
}

// SecondExample method also needs pkgScopedVar
func (c Client) SecondExample() {
	_ = pkgScopedVar[5:] // example
}