function getTypeFromNonGenericTypeReference(node, symbol) {
            if (symbol.flags & 262144 /* TypeParameter */ && isTypeParameterReferenceIllegalInConstraint(node, symbol)) {
                // TypeScript 1.0 spec (April 2014): 3.4.1
                // Type parameters declared in a particular type parameter list
                // may not be referenced in constraints in that type parameter list
                // Implementation: such type references are resolved to 'unknown' type that usually denotes error
                return unknownType;
            }
            if (node.typeArguments) {
                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
                return unknownType;
            }
            return getDeclaredTypeOfSymbol(symbol);
        }