size_t (*get_size)(struct lttng_ctx_field *field, size_t offset);
void (*record)(struct lttng_ctx_field *field,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
size_t (*get_size)(struct lttng_ctx_field *field, size_t offset);
void (*record)(struct lttng_ctx_field *field,
struct lttng_ust_lib_ring_buffer_ctx *ctx,