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: mocks_generated_test.go
    path of file: ./repos/cockroach/pkg/kv/kvclient/rangefeed
    
    the code of the file until where you have to start completion: // Code generated by MockGen. DO NOT EDIT.
// Source: github.com/cockroachdb/cockroach/pkg/kv/kvclient/rangefeed (interfaces: DB)

// Package rangefeed is a generated GoMock package.
package rangefeed

import (
	context "context"
	reflect
    
func (m *MockDB) RangeFeed(arg0 context.Context, arg1 []roachpb.Span, arg2 hlc.Timestamp, arg3 chan<- kvcoord.RangeFeedMessage, arg4 ...kvcoord.RangeFeedOption) error {
	m.ctrl.T.Helper()
	varargs := []interface{}{arg0, arg1, arg2, arg3}
	for _, a := range arg4 {
		varargs = append(varargs, a)
	}
	ret := m.ctrl.Call(m, "RangeFeed", varargs...)
	ret0, _ := ret[0].(error)
	return ret0
}