class DropViewChange extends AbstractChange {
    private String catalogName;
    private String schemaName;
    private String viewName;
    private Boolean ifExists;

    @DatabaseChangeProperty(mustEqualExisting ="view.catalog", since = "3.0", description = "Name of the database catalog")
    public String getCatalogName() {
        return catalogName;
    }

    public void setCatalogName(String catalogName) {
        this.catalogName = catalogName;
    }

    @DatabaseChangeProperty(mustEqualExisting ="view.schema", description = "Name of the database schema")
    public String getSchemaName() {
        return schemaName;
    }

    public void setSchemaName(String schemaName) {
        this.schemaName = schemaName;
    }

    @DatabaseChangeProperty(mustEqualExisting = "view", description = "Name of the view to drop")
    public String getViewName() {
        return viewName;
    }

    public void setViewName(String viewName) {
        this.viewName = viewName;
    }

    @DatabaseChangeProperty(since = "4.19.0", supportsDatabase = ALL,
        description = "Appends IF EXISTS to the DROP VIEW statement. If ifExists=true, the view is only dropped if it already exists, but the migration continues even if the view does not exist. If ifExists=false and the view does not exist, the database returns an error. Default: false.")
    public Boolean isIfExists() {
        return ifExists;
    }

    public void setIfExists(Boolean ifExists) {
        this.ifExists = ifExists;
    }

    @Override
    public SqlStatement[] generateStatements(Database database) {
        return new SqlStatement[]{
                new DropViewStatement(getCatalogName(), getSchemaName(), getViewName(), isIfExists()),
        };
    }

    @Override
    public ChangeStatus checkStatus(Database database) {<FILL_FUNCTION_BODY>}


    @Override
    public String getConfirmationMessage() {
        return "View "+getViewName()+" dropped";
    }

    @Override
    public String getSerializedObjectNamespace() {
        return STANDARD_CHANGELOG_NAMESPACE;
    }
}

        try {
            return new ChangeStatus().assertComplete(!SnapshotGeneratorFactory.getInstance().has(new View(getCatalogName(), getSchemaName(), getViewName()), database), "View exists");
        } catch (Exception e) {
            return new ChangeStatus().unknown(e);
        }
    
<methods>public void <init>() ,public liquibase.change.ChangeStatus checkStatus(liquibase.database.Database) ,public liquibase.change.ChangeMetaData createChangeMetaData() ,public boolean equals(java.lang.Object) ,public void finishInitialization() throws liquibase.exception.SetupException,public liquibase.change.CheckSum generateCheckSum() ,public liquibase.statement.SqlStatement[] generateRollbackStatements(liquibase.database.Database) throws liquibase.exception.RollbackImpossibleException,public boolean generateRollbackStatementsVolatile(liquibase.database.Database) ,public boolean generateStatementsVolatile(liquibase.database.Database) ,public Set<liquibase.structure.DatabaseObject> getAffectedDatabaseObjects(liquibase.database.Database) ,public liquibase.changelog.ChangeSet getChangeSet() ,public java.lang.String getDescription() ,public java.lang.String[] getExcludedFieldFilters(liquibase.ChecksumVersion) ,public liquibase.resource.ResourceAccessor getResourceAccessor() ,public java.lang.String getSerializableFieldNamespace(java.lang.String) ,public liquibase.serializer.LiquibaseSerializable.SerializationType getSerializableFieldType(java.lang.String) ,public java.lang.Object getSerializableFieldValue(java.lang.String) ,public Set<java.lang.String> getSerializableFields() ,public java.lang.String getSerializedObjectName() ,public java.lang.String getSerializedObjectNamespace() ,public int hashCode() ,public void load(liquibase.parser.core.ParsedNode, liquibase.resource.ResourceAccessor) throws liquibase.parser.core.ParsedNodeException,public void modify(liquibase.change.visitor.ChangeVisitor) throws liquibase.parser.core.ParsedNodeException,public liquibase.parser.core.ParsedNode serialize() throws liquibase.parser.core.ParsedNodeException,public void setChangeSet(liquibase.changelog.ChangeSet) ,public void setResourceAccessor(liquibase.resource.ResourceAccessor) ,public boolean shouldExecuteChange(liquibase.database.Database) ,public boolean supports(liquibase.database.Database) ,public boolean supportsRollback(liquibase.database.Database) ,public java.lang.String toString() ,public liquibase.exception.ValidationErrors validate(liquibase.database.Database) ,public liquibase.exception.Warnings warn(liquibase.database.Database) <variables>private static final java.util.regex.Pattern ALPHABET,protected static final java.lang.String NODENAME_COLUMN,private liquibase.changelog.ChangeSet changeSet