function isDirectiveimport { isDirective } from "https://dotland.deno.dev/x/graphql_deno@v15.0.0/lib/type/directives.d.ts"; isDirective(directive: any): directive is GraphQLDirectiveTest if the given value is a GraphQL directive. Test if the given value is a GraphQL directive. Parametersdirective: anyReturnsdirective is GraphQLDirective