const insertLines = splitLines(insertText);
if (insertLines.length === 1) {
this._setLineText(position.lineNumber - 1,
this._lines[position.lineNumber - 1].substring(0, position.column - 1)
+ insertLines[0]
+ this._lines[position.lineNumber - 1].substring(position.column - 1)
);
return;
}
// Append overflowing text from first line to the end of text to insert