public CalculatedCacheContextInterface::getContext($parameter = 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.
string|null $parameter: The parameter, or NULL to indicate all possible parameter values.
string The string representation of the cache context. When $parameter is NULL, a value representing all possible parameters must be generated.
\LogicException Thrown if the passed in parameter is invalid.
public function getContext($parameter = NULL);
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