public NodeAccessGrantsCacheContext::getContext($operation = NULL)
Returns the string representation of the cache context.
A cache context service's name is used as a token (placeholder) cache key, and is then replaced with the string returned by this method.
Parameters
string|null $parameter: The parameter, or NULL to indicate all possible parameter values.
Return value
string The string representation of the cache context. When $parameter is NULL, a value representing all possible parameter