code: public final GeographyPointValue getGeographyPointValue(int columnIndex) {
          validateColumnType(columnIndex, VoltType.GEOGRAPHY_POINT);
          GeographyPointValue pt = GeographyPointValue.unflattenFromBuffer(m_buffer, getOffset(columnIndex));
          m_wasNull = (pt == null);
          return pt;
      }
docs: Retrieve the GeographyPointValue value stored in the column specified by index.
  Looking at the return value is not a reliable way to check if the value is
  <tt>null</tt>. Use {@link #wasNull()} instead.
  @param columnIndex Index of the column
  @return GeographyPointValue value stored in the specified column
  @see #wasNull()