off /collection//document/
display:none; display:block;

sectionHeader

▲
sectionContainer hasText display:block; sectionContainer noText display:block; sectionContainer noText display:none; display:block; display:none;

...
...
display:none; display:block;
<Section> <Description> <Metadata name="Title"> </Metadata> </Description> </Section>

performDistanceSearch(' ', ' ', ' ', 2);