Function checkCompatEnabled

packages/runtime-core/src/compat/compatConfig.ts:625–635

(
  key: DeprecationTypes,
  instance: ComponentInternalInstance | null,
  ...args: any[]
)

 * e.g. render function
 */
export function checkCompatEnabled(
  key: DeprecationTypes,
  instance: ComponentInternalInstance | null,
  ...args: any[]
): boolean {
  const enabled = isCompatEnabled(key, instance)
  if (__DEV__ && enabled) {
    warnDeprecation(key, instance, ...args)
  }
  return enabled
}

// run tests in v3 mode by default
if (__TEST__) {