You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: runmain.go
    path of file: ./repos/caire/vendor/gioui.org/app
    
    the code of the file until where you have to start completion: // SPDX-License-Identifier: Unlicense OR M
    
func runMain() {
	runMainOnce.Do(func() {
		// Indirect call, since the linker does not know the address of main when
		// laying down this package.
		fn := mainMain
		fn()
	})
}