in packages/core/src/models/TransformHelper.ts [265:284]
get thresholdSnapLines(): SnapLine[] {
if (!this.dragging) return []
const lines: SnapLine[] = []
this.aroundSnapLines.forEach((line) => {
lines.push(line)
})
this.rulerSnapLines.forEach((line) => {
if (line.closest) {
lines.push(line)
}
})
for (let type in this.aroundSpaceBlocks) {
const block = this.aroundSpaceBlocks[type]
const line = block.snapLine
if (line) {
lines.push(line)
}
}
return lines
}