SDK • Enable an interface library user to change I2C instance between i2c0 or i2c1 using a function - best practices?

Code:

// declaration of external variable for setting I2C instanceextern i2c_inst_t *i2c_instance;

Code:

// variable to set the I2C instance to be used by sensor_set_instance()i2c_inst_t *i2c_instance = i2c0;  // Default to i2c0// Function to set the I2C instance (i2c0 or i2c1)void sensor_set_instance(i2c_inst_t *instance) {    i2c_instance = instance;}// below would be functions that use SDK i2c functions that require setting an i2c instance// EXAMPLE write data to a register using defined device address to i2c_instance set by sensor_set_instance()void write_register(uint8_t reg, uint16_t data) {    uint8_t buffer[3] = {reg, ((data >> 8) & 0xFF), (data & 0xFF)};    i2c_write_blocking(i2c_instance, sensor_address, buffer, 3, false);    last_pointer = reg;  // Update the last used pointer}

Code:

#include "sensor.h"#include "hardware/i2c.h"int main(void) {    // Selects I2C instance (I2C0 is set as default in the sensor.c)    //sensor_set_instance(i2c1); // change to i2c1 as needed    // initialize I2C (I2C0 is default)    i2c_init(i2c_instance, 400 * 1000); // sensor is 400 kHz max.// ETC}