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# PR_GetDefaultIOMethods
Gets the default I/O methods table.
## Syntax
```{code}
#include <prio.h>
const PRIOMethods* PR_GetDefaultIOMethods(void);
```
### Returns
If successful, the function returns a pointer to a {ref}`PRIOMethods`
structure.
## Description
After using {ref}`PR_GetDefaultIOMethods` to identify the default I/O
methods table, you can select elements from that table with which to
build your own layer's methods table. You may not modify the default I/O
methods table directly. You can pass your own layer's methods table to
{ref}`PR_CreateIOLayerStub` to create your new layer.