https://github.com/FasterXML/jackson-core: Core Jackson processing abstractions (aka Streaming API), implementation for JSON (FasterXML)
  • Tatu Saloranta
  • Christopher Currie
  • Paul Brown 
Package that contains interfaces needed for dynamic, pluggable
format (auto)detection; as well as basic utility classes for
simple format detection functionality.

/**
 * Package that contains interfaces needed for dynamic, pluggable
 * format (auto)detection; as well as basic utility classes for
 * simple format detection functionality.
 */
package com.fasterxml.jackson.core.format;