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

    boolean this_present_schema = true && this.isSetSchema();
    boolean that_present_schema = true && that.isSetSchema();
    if (this_present_schema || that_present_schema) {
      if (!(this_present_schema && that_present_schema))
        return false;
      if (!this.schema.equals(that.schema))
        return false;
    }

    boolean this_present_version = true;
    boolean that_present_version = true;
    if (this_present_version || that_present_version) {
      if (!(this_present_version && that_present_version))
        return false;
      if (this.version != that.version)
        return false;
    }

    return true;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/SchemaVersionDescriptor.java