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Fix SwiftUI Previews #2135

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Fix SwiftUI Previews #2135

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4 changes: 2 additions & 2 deletions Source/ASInternalHelpers.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,7 @@ void ASInitializeFrameworkMainThreadOnConstructor(void)
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
ASDisplayNodeCAssertMainThread();
ASDisplayNodeCAssert([NSThread isMainThread], @"This method must be called on the main/preview-host thread");
ASNotifyInitialized();
#if AS_SIGNPOST_ENABLE
_ASInitializeSignpostObservers();
Expand All @@ -77,7 +77,7 @@ void ASInitializeFrameworkMainThreadOnDestructor(void)
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
ASDisplayNodeCAssertMainThread();
ASDisplayNodeCAssert([NSThread isMainThread], @"This method must be called on the main/preview-host thread");
// Ensure these values are cached on the main thread before needed in the background.
if (ASActivateExperimentalFeature(ASExperimentalLayerDefaults)) {
// Nop. We will gather default values on-demand in ASDefaultAllowsGroupOpacity and ASDefaultAllowsEdgeAntialiasing
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