úήðmainland@eecs.harvard.eduNone(Unique identifier and the string itself Intern a string to produce a .  Return the  associated with a .      mainland@eecs.harvard.edu Trustworthy       symbol-0.2.0Data.Symbol.Unsafe Data.SymbolSymbolinternuninternbaseGHC.BaseString SymbolEnvuniqsymbols symbolEnv$fIsStringSymbol $fShowSymbol $fOrdSymbol $fEqSymbol