1 | import { ValidationOptions } from '../ValidationOptions';
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2 | import ValidatorJS from 'validator';
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3 | export declare const IS_ISSN = "isISSN";
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4 | /**
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5 | * Checks if the string is a ISSN.
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6 | * If given value is not a string, then it returns false.
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7 | */
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8 | export declare function isISSN(value: unknown, options?: ValidatorJS.IsISSNOptions): boolean;
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9 | /**
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10 | * Checks if the string is a ISSN.
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11 | * If given value is not a string, then it returns false.
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12 | */
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13 | export declare function IsISSN(options?: ValidatorJS.IsISSNOptions, validationOptions?: ValidationOptions): PropertyDecorator;
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