caller

type Caller interface {
	// File returns the file in which the call occurred.
	File() string

	// Func returns the name of the function in which the call occurred.
	Func() string

	// Line returns the line number in the file in which the call occurred.
	Line() int

	// Pc returns the program counter.
	Pc() uintptr

	// Trace returns the call stack.
	Trace() Trace
}

type Trace []Caller