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: managedresource.go
    path of file: ./repos/go-zero/core/syncx
    
    the code of the file until where you have to start completion: package syncx

import "sync"

// A ManagedResource is used to manage a resource that might be broken and refetched, like a connection.
type ManagedResource struct {
	resource any
	lock     sync.RWMutex
	generate func() any
	equals   func(a, b any) 
    
func (mr *ManagedResource) Take() any {
	mr.lock.RLock()
	resource := mr.resource
	mr.lock.RUnlock()

	if resource != nil {
		return resource
	}

	mr.lock.Lock()
	defer mr.lock.Unlock()
	// maybe another Take() call already generated the resource.
	if mr.resource == nil {
		mr.resource = mr.generate()
	}
	return mr.resource
}