Represents all currently active section blocks associated with the processing of this template. That is:
sectionBlocks[0]
The current section block (same as sectionBlock property)
sectionBlocks[1]
The parent section block, from which the current one has been started. Note, the parent block is not necessary the one physically enclosing the current block. When the current block is the root block of a stock-section, its parent will be where this stock-section has been called from.
sectionBlocks[2]
The parent of the parent
...
sectionBlocks[N]
The template root section block