Function getTemplateTypeFromMappedType

test/fixtures/snapshot/typescript.js:58644–58649

(type)

                undefined;
        }
        function getTemplateTypeFromMappedType(type) {
            return type.templateType ||
                (type.templateType = type.declaration.type ?
                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), /*isProperty*/ true, !!(getMappedTypeModifiers(type) & 4 /* MappedTypeModifiers.IncludeOptional */)), type.mapper) :
                    errorType);
        }
        function getConstraintDeclarationForMappedType(type) {
            return ts.getEffectiveConstraintOfTypeParameter(type.declaration.typeParameter);
        }