whate is the different version license store type in V1、V2、V4？

[beijixing1745]

V2JsonLicense、V4License、LicenseContent for different version license entity model？
What's the difference between them？
now，Best practices，use V4License？

“This facade provides a static factory method for license management context builders for use with Version 4 (V4) format license keys. This class should not be used by applications because the created license management context builders are only partially configured.”