nl_tokens: A declaration has a dynamic name if both of the following are true : 1 . The declaration has a computed property name 2 . The computed name is * not * expressed as Symbol . <name > where name is a property of the Symbol constructor that denotes a built in Symbol .
pl_tokens: function hasDynamicName ( declaration ) { return declaration . name && declaration . name . kind === 136 /* ComputedPropertyName */ && ! isWellKnownSymbolSyntactically ( declaration . <mask> . expression ) ; }