lojix/text_model/src/main/com/thesett/text/impl/model/TextGridImpl.java
private void internalInsert(char character, int c, int r)
    {
        maxColumn = (c > maxColumn) ? c : maxColumn;
        maxRow = (r > maxRow) ? r : maxRow;

        data.put((long) c, (long) r, character);
    }
private void internalInsert(char character, int c, int r)
    {
        maxColumn = (c > maxColumn) ? c : maxColumn;
        maxRow = (r > maxRow) ? r : maxRow;

        data.put((long) c, (long) r, character);
    }
Inserts a single character into the grid at the specified location. This is a private insert method, that does
not notify model listeners, so that the public insert methods can do that as a separate step.

@param character The character to insert.
@param c         The column position.
@param r         The row position.