How to use the @graphql-codegen/visitor-plugin-common.optimizeOperations function in @graphql-codegen/visitor-plugin-common

export const plugin: PluginFunction = (schema: GraphQLSchema, rawDocuments: Types.DocumentFile[], config: FlowDocumentsPluginConfig) => {
  const documents = config.flattenGeneratedTypes ? optimizeOperations(schema, rawDocuments) : rawDocuments;
  let prefix = `type $Pick = $ObjMapi(k: Key) => $ElementType>;\n`;

  const allAst = concatAST(
    documents.reduce((prev, v) => {
      return [...prev, v.content];
    }, [])
  );

  const allFragments: LoadedFragment[] = [
    ...(allAst.definitions.filter(d => d.kind === Kind.FRAGMENT_DEFINITION) as FragmentDefinitionNode[]).map(fragmentDef => ({ node: fragmentDef, name: fragmentDef.name.value, onType: fragmentDef.typeCondition.name.value, isExternal: false })),
    ...(config.externalFragments || []),
  ];

  const visitorResult = visit(allAst, {
    leave: new FlowDocumentsVisitor(schema, config, allFragments),
  });

export const plugin: PluginFunction = (schema: GraphQLSchema, rawDocuments: Types.DocumentFile[], config: TypeScriptDocumentsPluginConfig) => {
  const documents = config.flattenGeneratedTypes ? optimizeOperations(schema, rawDocuments) : rawDocuments;
  const allAst = concatAST(
    documents.reduce((prev, v) => {
      return [...prev, v.content];
    }, [])
  );

  const allFragments: LoadedFragment[] = [
    ...(allAst.definitions.filter(d => d.kind === Kind.FRAGMENT_DEFINITION) as FragmentDefinitionNode[]).map(fragmentDef => ({ node: fragmentDef, name: fragmentDef.name.value, onType: fragmentDef.typeCondition.name.value, isExternal: false })),
    ...(config.externalFragments || []),
  ];

  const visitorResult = visit(allAst, {
    leave: new TypeScriptDocumentsVisitor(schema, config, allFragments),
  });

  const result = visitorResult.definitions.join('\n');