Function _renderTemplate

_renderTemplate(
    spec: { templateConfig: object },
    opts?: {
        isLastDeclaration?: boolean;
        keepRegion?: boolean;
        requestId?: string;
    },
): Promise<{ shapes: object[]; tempRegionDoc?: any; tokenUuids: string[] }>
Local template-placement renderer — two phases:
1. Player positions the region shape (left-click to set).
2. A temporary RegionDocument is created so the area is visible on-canvas. Player clicks Submit to confirm or Cancel to abort. The temp region is deleted either way (unless keepRegion is true); containment testing runs against the placed shape.
Parameters
- spec: { templateConfig: object }
- Optionalopts: { isLastDeclaration?: boolean; keepRegion?: boolean; requestId?: string } = {}
  - OptionalisLastDeclaration?: boolean
    
    When false, replace the Confirm/Submit button with a "Next" button (class "bms-tile-picker-next"). "Next" advances to the next placement without being the final submission of the full sequence.
  - OptionalkeepRegion?: boolean
    
    When true, skip deleting tempRegionDoc after confirmation and return it in the result. Used for multi-template pre-collect so previously placed regions stay visible during subsequent placements.
  - OptionalrequestId?: string
Returns Promise<{ shapes: object[]; tempRegionDoc?: any; tokenUuids: string[] }>
- Defined in module/helpers/triggers.mjs:1172