resolveLineHeight method
Calculate based on the the current value to return the more similar line height as should see on a PDF (and like Docx, libreoffice formatting too)
Implementation
double resolveLineHeight() {
if (this <= 0) return 0;
if (this == 2.0) return 23.5;
if (this == 1.5) return 12.5;
if (this == 1.15) return 6.5;
return this;
}