github.com/evanw/esbuild/internal/js_parser.mappingArray.Swap (method)

one use

	github.com/evanw/esbuild/internal/js_parser (current package)
		sourcemap_parser.go#L244: func (a mappingArray) Swap(i int, j int) { a[i], a[j] = a[j], a[i] }