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- {"ast":null,"code":"import { Observable } from '../Observable';\nimport { from } from './from';\nimport { EMPTY } from './empty';\nexport function using(resourceFactory, observableFactory) {\n return new Observable(subscriber => {\n let resource;\n try {\n resource = resourceFactory();\n } catch (err) {\n subscriber.error(err);\n return undefined;\n }\n let result;\n try {\n result = observableFactory(resource);\n } catch (err) {\n subscriber.error(err);\n return undefined;\n }\n const source = result ? from(result) : EMPTY;\n const subscription = source.subscribe(subscriber);\n return () => {\n subscription.unsubscribe();\n if (resource) {\n resource.unsubscribe();\n }\n };\n });\n}\n//# sourceMappingURL=using.js.map","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}
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