úÎñ3mainland@eecs.harvard.eduNone(Unique identifier and the string itself Intern a string to produce a .  Return the  associated with a .            symbol-0.1.4 Data.SymbolSymbolinternuninternbaseGHC.BaseString SymbolEnvuniqsymbols symbolEnv$fIsStringSymbol $fShowSymbol $fOrdSymbol $fEqSymbol