This test exercises basic 'stub methods' functionality, with resolve support.
See basic.txt for the same test without resolve support.

-- capabilities.json --
{
	"textDocument": {
		"codeAction": {
			"dataSupport": true,
			"resolveSupport": {
				"properties": ["edit"]
			}
		}
	}
}
-- go.mod --
module example.com
go 1.12

-- a/a.go --
package a

type C int

var _ error = C(0) //@quickfix(re"C.0.", re"missing method Error", stub)
-- @stub/a/a.go --
@@ -5 +5,5 @@
+// Error implements error.
+func (c C) Error() string {
+	panic("unimplemented")
+}
+