codeant-ai-for-open-source[bot] commented on PR #38680:
URL: https://github.com/apache/superset/pull/38680#issuecomment-4069043493
## **Sequence Diagram**
This PR changes how derived time shifted series get dash styles in ECharts
timeseries transforms. Instead of generating small incremental dashes, it
assigns each time offset a stable index and applies a clearer pattern from a
fixed visible set while preserving derived series opacity.
```mermaid
sequenceDiagram
participant Chart as Chart transform
participant Mapper as Offset pattern map
participant Styler as Line styler
Chart->>Chart: Process each series entry
Chart->>Chart: Detect if entry is time shifted derived series
alt Derived series
Chart->>Mapper: Get or assign index for time offset
Mapper-->>Chart: Return stable pattern index
Chart->>Styler: Apply fixed visible dash pattern by index
Styler-->>Chart: Set dashed line and derived opacity
else Regular series
Chart->>Styler: Keep existing line style
end
```
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