| 1 | import Maybe from "../../tsutils/Maybe";
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| 2 | import { ASTValidationContext } from "../ValidationContext";
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| 3 | import { ASTVisitor } from "../../language/visitor";
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| 4 |
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| 5 | export function singleFieldOnlyMessage(name: Maybe<string>): string;
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| 6 |
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| 7 | /**
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| 8 | * Subscriptions must only include one field.
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| 9 | *
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| 10 | * A GraphQL subscription is valid only if it contains a single root field.
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| 11 | */
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| 12 | export function SingleFieldSubscriptions(context: ASTValidationContext): ASTVisitor;
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