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If you are using Developer Studio, you can import a connector into your ESB config project by right-clicking the project, choosing Import Connector, and then navigating to the connector's ZIP file (for a list of predefined ESB connectors you can download, see ESB Connectors). The operations in the connector are then displayed in the graphical ESB editor, allowing you to drag them to your proxy service, sequence, or other configuration.
For details on using the operations in these default connectors, see ESB Connectors.