in core/src/main/java/com/facebook/testing/screenshot/internal/RecordBuilderImpl.java [159:170]
void checkState() {
if (mError != null) {
return;
}
for (int i = 0; i < mTiling.getWidth(); i++) {
for (int j = 0; j < mTiling.getHeight(); j++) {
if (mTiling.getAt(i, j) == null) {
throw new IllegalStateException("expected all tiles to be filled");
}
}
}
}