To limit the impact of custom code on the VPE, where should the custom code be placed?

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Placing custom code within a custom function block is advantageous for several reasons. Function blocks are specifically designed to encapsulate code, allowing it to execute isolated from the main flow of the Visual Processing Engine (VPE). By doing so, they help manage dependencies, improve maintainability, and ensure that the main VPE workflow remains clear and unobstructed. This setup allows developers to write and test code in a modular fashion, reducing the risk of introducing errors that could affect the overall functionality of the automation process.

Furthermore, using custom function blocks can enhance performance by optimizing execution, since the function block can be executed independently. This approach helps in maintaining the overall stability of the VPE, as any potential issues within the custom code do not directly interfere with the primary automation workflow.

In contrast, other options may present challenges that don't align with the goal of limiting the impact of custom code on the VPE. For example, using a separate code repository could complicate the integration of the code with the VPE, leading to potential versioning or compatibility issues. Similarly, while a custom container or a separate KV store may isolate data well, they are not specifically tailored for the encapsulation of logic or procedures that a function block provides. A separate container may