@Override public boolean equals(Object that) { if (that == null) return false; if (that instanceof Column) return this.equals((Column)that); return false; }
@Override public boolean equals(Object that) { if (that == null) return false; if (that instanceof Column) return this.equals((Column)that); return false; }
@Override public boolean equals(Object that) { if (that == null) return false; if (that instanceof Column) return this.equals((Column)that); return false; }
if (!(this_present_column && that_present_column)) return false; if (!this.column.equals(that.column)) return false;
if (!(this_present_column && that_present_column)) return false; if (!this.column.equals(that.column)) return false;
if (!(this_present_column && that_present_column)) return false; if (!this.column.equals(that.column)) return false;