Method has

package/svelte/compiler.js:5607–5609

(name)

      return this.parent && this.parent.find_owner(name);
    }
    has(name) {
      return this.declarations.has(name) || !!this.parent && this.parent.has(name);
    }
  };
  function extract_names(param) {
    return extract_identifiers(param).map((node2) => node2.name);