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

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+import { ASTVisitor } from '../../language/visitor';
+import { ASTValidationContext } from '../ValidationContext';
+
+export function duplicateInputFieldMessage(fieldName: string): string;
+
+/**
+ * Unique input field names
+ *
+ * A GraphQL input object value is only valid if all supplied fields are
+ * uniquely named.
+ */
+export function UniqueInputFieldNames(
+  context: ASTValidationContext,
+): ASTVisitor;