Optional
declaration: DeclarationReadonly
fileNote: This is not serialized. It exists for sorting by declaration order, but
should not be needed when deserializing from JSON.
Will be set to Infinity
if the ID was deserialized from JSON.
Readonly
qualifiedNote: This is not serialized. It exists to support detection of the differences between
symbols which share declarations, but are instantiated with different type parameters.
This will be NaN
if the symbol reference is not transient.
Note: This can only be non-NaN if pos is finite.
This exists so that TypeDoc can store a unique identifier for a
ts.Symbol
without keeping a reference to thets.Symbol
itself. This identifier should be stable across runs so long as the symbol is exported from the same file.