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

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+import { ASTVisitor } from '../../language/visitor';
+import { ValidationContext } from '../ValidationContext';
+
+export function typeIncompatibleSpreadMessage(
+  fragName: string,
+  parentType: string,
+  fragType: string,
+): string;
+
+export function typeIncompatibleAnonSpreadMessage(
+  parentType: string,
+  fragType: string,
+): string;
+
+/**
+ * Possible fragment spread
+ *
+ * A fragment spread is only valid if the type condition could ever possibly
+ * be true: if there is a non-empty intersection of the possible parent types,
+ * and possible types which pass the type condition.
+ */
+export function PossibleFragmentSpreads(context: ValidationContext): ASTVisitor;