Method constructor

test/document.test.js:15259–15261

(key, options)

  it('supports global transforms per schematype (gh-15084)', async function() {
    class SchemaCustomType extends mongoose.SchemaType {
      constructor(key, options) {
        super(key, options, 'CustomType');
      }

      cast(value) {
        if (value === null) return null;