15 lines
449 B
TypeScript
15 lines
449 B
TypeScript
import Maybe from '../../tsutils/Maybe';
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import { ASTVisitor } from '../../language/visitor';
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import { ASTValidationContext } from '../ValidationContext';
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export function singleFieldOnlyMessage(name: Maybe<string>): string;
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/**
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* Subscriptions must only include one field.
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*
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* A GraphQL subscription is valid only if it contains a single root field.
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*/
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export function SingleFieldSubscriptions(
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context: ASTValidationContext,
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): ASTVisitor;
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