indexOfPart method
Implementation
int indexOfPart(SingleStringMathTex? part) {
var splitSelf = split();
if (part == null) {
throw 'Trying to get index of part not in MathTex';
}
var index = splitSelf.indexOf(part);
if (index < 0) {
throw 'Trying to get index of part not in MathTex';
}
return index;
}