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

    boolean this_present_schemaId = true;
    boolean that_present_schemaId = true;
    if (this_present_schemaId || that_present_schemaId) {
      if (!(this_present_schemaId && that_present_schemaId))
        return false;
      if (this.schemaId != that.schemaId)
        return false;
    }

    boolean this_present_updateColumns = true && this.isSetUpdateColumns();
    boolean that_present_updateColumns = true && that.isSetUpdateColumns();
    if (this_present_updateColumns || that_present_updateColumns) {
      if (!(this_present_updateColumns && that_present_updateColumns))
        return false;
      if (!this.updateColumns.equals(that.updateColumns))
        return false;
    }

    return true;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
amoro-common/src/main/gen-java/org/apache/amoro/api/SchemaUpdateMeta.java