By How to make Snackbar with more than two text lines
Very easy:
Snackbar.make(button, warning, Snackbar.LENGTH_INDEFINITE)
.setAction(android.R.string.ok) { button.isEnabled = true }
.setActionTextColor(resources.getColor(android.R.color.holo_red_light, null))
.apply { view.findViewById<TextView>(com.google.android.material.R.id.snackbar_text).maxLines = 5 }
.show()
