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: nilfunc.go
    path of file: ./repos/gitkube/vendor/golang.org/x/tools/go/analysis/passes/nilfunc
    
    the code of the file until where you have to start completion: // Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license 
    
func run(pass *analysis.Pass) (interface{}, error) {
	inspect := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)

	nodeFilter := []ast.Node{
		(*ast.BinaryExpr)(nil),
	}
	inspect.Preorder(nodeFilter, func(n ast.Node) {
		e := n.(*ast.BinaryExpr)

		// Only want == or != comparisons.
		if e.Op != token.EQL && e.Op != token.NEQ {
			return
		}

		// Only want comparisons with a nil identifier on one side.
		var e2 ast.Expr
		switch {
		case pass.TypesInfo.Types[e.X].IsNil():
			e2 = e.Y
		case pass.TypesInfo.Types[e.Y].IsNil():
			e2 = e.X
		default:
			return
		}

		// Only want identifiers or selector expressions.
		var obj types.Object
		switch v := e2.(type) {
		case *ast.Ident:
			obj = pass.TypesInfo.Uses[v]
		case *ast.SelectorExpr:
			obj = pass.TypesInfo.Uses[v.Sel]
		default:
			return
		}

		// Only want functions.
		if _, ok := obj.(*types.Func); !ok {
			return
		}

		pass.Reportf(e.Pos(), "comparison of function %v %v nil is always %v", obj.Name(), e.Op, e.Op == token.NEQ)
	})
	return nil, nil
}