prefixSumOnDeletedInterval = previousSpecialLine.prefixSum + previousSpecialLine.maximumSpecialHeight + this._defaultLineHeight * (fromLineNumber - previousSpecialLine.lineNumber - 1);
} else {
prefixSumOnDeletedInterval = fromLineNumber > 0 ? (fromLineNumber - 1) * this._defaultLineHeight : 0;
lineHeights.ts
}
const firstSpecialLineDeleted = this._orderedCustomLines[startIndexOfDeletion];
const lastSpecialLineDeleted = this._orderedCustomLines[endIndexOfDeletion];