This node implements a subroutine declaration such as 'subroutine uniform RenderOutputColor renderOutputColor', where this node stores RenderOutputColor as the signature and renderOutputColor as a handle to that subroutine.
Class registration and implementation information is as follows:
| Category Type | Information |
| Implementation | C++ |
| Module | GEOMETRY |
| Class Hierarchy | Node » SubroutineNode |
| Data Interface Name | SubroutineNode |