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node_modules/graphql/validation/rules/UniqueFieldDefinitionNames.d.ts

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+import { ASTVisitor } from '../../language/visitor';
+import { SDLValidationContext } from '../ValidationContext';
+
+export function duplicateFieldDefinitionNameMessage(
+  typeName: string,
+  fieldName: string,
+): string;
+
+export function existedFieldDefinitionNameMessage(
+  typeName: string,
+  fieldName: string,
+): string;
+
+/**
+ * Unique field definition names
+ *
+ * A GraphQL complex type is only valid if all its fields are uniquely named.
+ */
+export function UniqueFieldDefinitionNames(
+  context: SDLValidationContext,
+): ASTVisitor;