private void growTable(int numCols) {
        Array[] newCols = new Array[numCols];
        System.arraycopy(dataColumns,0,newCols,0,dataColumns.length);
        dataColumns = newCols;
    }
increases the number of columns in the table
@param numCols The number of columns needed in the table
Ghidra/Framework/Generic/src/main/java/ghidra/util/datastruct/DataTable.java