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[...existing, ...incoming] : incoming;\n },\n };\n}\n\n// A basic field policy that uses options.args.{offset,limit} to splice\n// the incoming data into the existing array. If your arguments are called\n// something different (like args.{start,count}), feel free to copy/paste\n// this implementation and make the appropriate changes.\nexport function offsetLimitPagination<T = Reference>(\n keyArgs: KeyArgs = false\n): FieldPolicy<T[]> {\n return {\n keyArgs,\n merge(existing, incoming, { args }) {\n const merged = existing ? existing.slice(0) : [];\n\n if (incoming) {\n if (args) {\n // Assume an offset of 0 if args.offset omitted.\n const { offset = 0 } = args;\n for (let i = 0; i < incoming.length; ++i) {\n merged[offset + i] = incoming[i];\n }\n } else {\n // It's unusual (probably a mistake) for a paginated field not\n // to receive any arguments, so you might prefer to throw an\n // exception here, instead of recovering by appending incoming\n // onto the existing array.\n merged.push(...incoming);\n }\n }\n\n return merged;\n },\n };\n}\n\n// Whether TRelayEdge<TNode> is a normalized Reference or a non-normalized\n// object, it needs a .cursor property where the relayStylePagination\n// merge function can store cursor strings taken from pageInfo. Storing an\n// extra reference.cursor property should be safe, and is easier than\n// attempting to update the cursor field of the normalized StoreObject\n// that the reference refers to, or managing edge wrapper objects\n// (something I attempted in #7023, but abandoned because of #7088).\nexport type TRelayEdge<TNode> =\n | {\n cursor?: string;\n node: TNode;\n }\n | (Reference & { cursor?: string });\n\nexport type TRelayPageInfo = {\n hasPreviousPage: boolean;\n hasNextPage: boolean;\n startCursor: string;\n endCursor: string;\n};\n\nexport type TExistingRelay<TNode> = Readonly<{\n edges: TRelayEdge<TNode>[];\n pageInfo: TRelayPageInfo;\n}>;\n\nexport type TIncomingRelay<TNode> = {\n edges?: TRelayEdge<TNode>[];\n pageInfo?: TRelayPageInfo;\n};\n\nexport type RelayFieldPolicy<TNode> = FieldPolicy<\n TExistingRelay<TNode> | null,\n TIncomingRelay<TNode> | null,\n TIncomingRelay<TNode> | null\n>;\n\n// As proof of the flexibility of field policies, this function generates\n// one that handles Relay-style pagination, without Apollo Client knowing\n// anything about connections, edges, cursors, or pageInfo objects.\nexport function relayStylePagination<TNode extends Reference = Reference>(\n keyArgs: KeyArgs = false\n): RelayFieldPolicy<TNode> {\n return {\n keyArgs,\n\n read(existing, { canRead, readField }) {\n if (!existing) return existing;\n\n const edges: TRelayEdge<TNode>[] = [];\n let firstEdgeCursor = \"\";\n let lastEdgeCursor = \"\";\n existing.edges.forEach((edge) => {\n // Edges themselves could be Reference objects, so it's important\n // to use readField to access the edge.edge.node property.\n if (canRead(readField(\"node\", edge))) {\n edges.push(edge);\n if (edge.cursor) {\n firstEdgeCursor = firstEdgeCursor || edge.cursor || \"\";\n lastEdgeCursor = edge.cursor || lastEdgeCursor;\n }\n }\n });\n\n if (edges.length > 1 && firstEdgeCursor === lastEdgeCursor) {\n firstEdgeCursor = \"\";\n }\n\n const { startCursor, endCursor } = existing.pageInfo || {};\n\n return {\n // Some implementations return additional Connection fields, such\n // as existing.totalCount. 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