private CodeBlockIterator getBlockIterator() throws CancelledException {
		return blockModel.getCodeBlocksContaining(graphScope, taskMonitor);
	}
Set the maximum number of code lines which will be used per block when
showCode is enabled.
@param maxLines maximum number of code lines
Ghidra/Features/ProgramGraph/src/main/java/ghidra/graph/program/BlockGraphTask.java