A lazily initialized singleton that holds the global registry of known
values.
This class provides thread-safe, lazy initialization of the global
KnownValuesStore that contains all the predefined Known Values in the
registry. The store is created only when first accessed, and subsequent
accesses reuse the same instance.
This is used internally by the crate and should not typically be needed by
users of the API, who should access Known Values through the constants
exposed in the known_values module.
A lazily initialized singleton that holds the global registry of known values.
This class provides thread-safe, lazy initialization of the global KnownValuesStore that contains all the predefined Known Values in the registry. The store is created only when first accessed, and subsequent accesses reuse the same instance.
This is used internally by the crate and should not typically be needed by users of the API, who should access Known Values through the constants exposed in the
known_valuesmodule.