method GraphQLSchema.prototype.isSubTypeimport { GraphQLSchema } from "https://deno.land/x/graphql_deno@v15.0.0/mod.ts"; isSubType(abstractType: GraphQLAbstractType, maybeSubType: GraphQLNamedType): booleanParametersabstractType: GraphQLAbstractTypemaybeSubType: GraphQLNamedTypeReturnsboolean