in.expectNewline("#if[n]def")
	if !in.enabled() {
		truth = false
	} else if _, defined := in.macros[name]; !defined {
		truth = !truth
	}
	in.ifdefStack = append(in.ifdefStack, truth)
}

// #else processing
func (in *Input) else_() {
	in.expectNewline("#else")
	if len(in.ifdefStack) == 0 {
		in.Error("unmatched #else")
	}
	if len(in.ifdefStack) == 1 || in.ifdefStack[len(in.ifdefStack)-2] {

    not_: Optional["SchemaOrBool"] = Field(default=None, alias="not")
    if_: Optional["SchemaOrBool"] = Field(default=None, alias="if")
    then: Optional["SchemaOrBool"] = None
    else_: Optional["SchemaOrBool"] = Field(default=None, alias="else")
    dependentSchemas: Optional[dict[str, "SchemaOrBool"]] = None
    prefixItems: Optional[list["SchemaOrBool"]] = None
    # TODO: uncomment and remove below when deprecating Pydantic v1

                } else {
                    // move on to next in r1
                    if (i1.hasNext()) {
                        res1 = i1.next();
                    } else {
                        done = true;
                    }
                }
            } else {
                // move on to next in r2
                if (i2.hasNext()) {
                    res2 = i2.next();
                } else {

		schema.buildPolymorphicRelation(relation, field)
	} else if many2many := field.TagSettings["MANY2MANY"]; many2many != "" {
		schema.buildMany2ManyRelation(relation, field, many2many)
	} else if belongsTo := field.TagSettings["BELONGSTO"]; belongsTo != "" {
		schema.guessRelation(relation, field, guessBelongs)
	} else {
		switch field.IndirectFieldType.Kind() {
		case reflect.Struct:

    Map<K, V> map = makeEitherMap();
    if (allowsNullKeys) {
      if (allowsNullValues) {
        // TODO: decide what to test here.
      } else {
        assertEquals(map.containsKey(null), map.get(null) != null);
      }
    } else {
      try {
        V unused = map.get(null);
      } catch (NullPointerException optional) {
      }
    }
    assertInvariants(map);
  }

				if db.Statement.Schema == nil {
					clauseSelect.Columns[idx] = clause.Column{Name: name, Raw: true}
				} else if f := db.Statement.Schema.LookUpField(name); f != nil {
					clauseSelect.Columns[idx] = clause.Column{Name: f.DBName}
				} else {
					clauseSelect.Columns[idx] = clause.Column{Name: name, Raw: true}
				}
			}
		} else if db.Statement.Schema != nil && len(db.Statement.Omits) > 0 {

            } else if (LOC_ELEMENT.equals(elementName) || LASTMOD_ELEMENT.equals(elementName) || CHANGEFREQ_ELEMENT.equals(elementName)
                    || PRIORITY_ELEMENT.equals(elementName)) {
                buf = new StringBuilder();
            } else if (IMAGE_IMAGE_ELEMENT.equals(elementName)) {
                currentImage = new SitemapImage();

			} else if stmt.Schema.PrioritizedPrimaryField != nil {
				write(v.Raw, stmt.Schema.PrioritizedPrimaryField.DBName)
			} else if len(stmt.Schema.DBNames) > 0 {
				write(v.Raw, stmt.Schema.DBNames[0])
			} else {
				stmt.DB.AddError(ErrModelAccessibleFieldsRequired) //nolint:typecheck,errcheck
			}
		} else {
			write(v.Raw, v.Name)
		}

		if v.Alias != "" {
			writer.WriteString(" AS ")

        java.util.Map<Object, InputLocation> targetLocations = target.getLocations();
        if (sourceLocations == null) {
            locations = targetLocations;
        } else if (targetLocations == null) {
            locations = sourceLocations;
        } else {
            locations = new java.util.LinkedHashMap();
            locations.putAll(sourceDominant ? targetLocations : sourceLocations);

                    }
                } else if (sort == 1) {
                    if (compareSizes(dirents[i], name, (SmbFile) iter.next()) < 0) {
                        break;
                    }
                } else if (sort == 2) {
                    if (compareTypes(dirents[i], name, (SmbFile) iter.next()) < 0) {
                        break;
                    }