OpenGl → TCollection Relation

File in src/OpenGl	Includes file in src/TCollection
OpenGl_Buffer.hxx	TCollection_AsciiString.hxx
OpenGl_Font.hxx	TCollection_AsciiString.hxx
OpenGl_NamedResource.hxx	TCollection_AsciiString.hxx
OpenGl_ShaderProgram.hxx	TCollection_AsciiString.hxx
OpenGl_TextureFormat.hxx	TCollection_AsciiString.hxx