code: func ClearNamedBufferData(buffer uint32, internalformat uint32, format uint32, xtype uint32, data unsafe.Pointer) {
  	C.glowClearNamedBufferData(gpClearNamedBufferData, (C.GLuint)(buffer), (C.GLenum)(internalformat), (C.GLenum)(format), (C.GLenum)(xtype), data)
  }
docs: // fill a buffer object's data store with a fixed value