Binary package “qtbase5-private-gles-dev” in ubuntu xenial

Qt 5 base private development files - OpenGLES

 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 This package contains the private header development files for building some
 Qt 5 applications like Qt Creator QML Designer plugin (built with the
 OpenGLES backend).
 .
 Use at your own risk.