kubernetes/staging/src/k8s.io/cli-runtime/pkg/printers/jsonpath.go

// exists returns true if it would be possible to call the index function
// with these arguments.
//
// TODO: how to document this for users?
//
// index returns the result of indexing its first argument by the following
// arguments.  Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each
// indexed item must be a map, slice, or array.
func exists(item interface{ … }

// stolen from text/template
// indirect returns the item at the end of indirection, and a bool to indicate if it's nil.
// We indirect through pointers and empty interfaces (only) because
// non-empty interfaces have methods we might need.
func indirect(v reflect.Value) (rv reflect.Value, isNil bool) { … }

type JSONPathPrinter …

func NewJSONPathPrinter(tmpl string) (*JSONPathPrinter, error) { … }

// PrintObj formats the obj with the JSONPath Template.
func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error { … }