private CodeBlock createSimpleExtBlock(Address extAddr) {
		CodeBlock block = new ExtCodeBlockImpl(this, extAddr);
		foundBlockMap.addObject(block, extAddr, extAddr);
		return block;
	}
Create a new block over an address range with one or more entry-points.
@param entryPts an array of entry-point addresses for the block.
@param begin the first address in the range.
@param end last address in the range.
@return CodeBlock
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/block/SimpleBlockModel.java