protected void setLength(long length) throws IOException {
		this.subBlockLength = length;
		record.setLongValue(MemoryMapDBAdapter.SUB_LENGTH_COL, length);
		adapter.updateSubBlockRecord(record);
	}
Sets the length of a subblock (Used by the split command)
@param length the new length of the block
@throws IOException if a database error occurs
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/mem/SubMemoryBlock.java