Map of all directive definitions to eventually be passed to extendSchema original: [name: string]: { [serviceName: string]: DirectiveDefinitionNode };.

directive name => usages.

field name => directive name => usages.

subgraph name => DirectiveUsagesPerType.

type name => { directives: DirectiveUsages, fields: DirectiveUsagesPerField }.

Map of types to their key directives (maintains association to their services) Example resulting KeyDirectivesMap shape: const keyDirectives = { Product: { serviceA: ["sku", "upc"] serviceB: ["color {id value}"] // Selection node simplified for readability } } original: [typeName: string]: ServiceNameToKeyDirectivesMap;.

original: [serviceName: string]: ReadonlyArray<SelectionNode>[] | undefined;.

Map of all type definitions to eventually be passed to extendSchema.

A map of base types to their owning service.

A set of type names that have been determined to be a value type, a type shared across at least 2 services.