public boolean equals(TColumn that) {
    if (that == null)
      return false;
    if (this == that)
      return true;

    boolean this_present_columnName = true && this.isSetColumnName();
    boolean that_present_columnName = true && that.isSetColumnName();
    if (this_present_columnName || that_present_columnName) {
      if (!(this_present_columnName && that_present_columnName))
        return false;
      if (!this.columnName.equals(that.columnName))
        return false;
    }

    boolean this_present_cell = true && this.isSetCell();
    boolean that_present_cell = true && that.isSetCell();
    if (this_present_cell || that_present_cell) {
      if (!(this_present_cell && that_present_cell))
        return false;
      if (!this.cell.equals(that.cell))
        return false;
    }

    return true;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/TColumn.java