// Convert the input image to TPG format
name := "test.png"
filepath := "test.tpg"
_, err := c.CI.GetToFile(context.Background(), name, filepath, "imageMogr2/format/tpg", nil)
if err != nil {
    // ERROR
}

// Convert the input image to HEIF format
filepath = "test.heif"
_, err = c.CI.GetToFile(context.Background(), name, filepath, "imageMogr2/format/heif", nil)
if err != nil {
    // ERROR
}