public void copy(int offset, DataBuffer buf, int bufOffset, int length) {
		dirty = true;
		System.arraycopy(buf.data, bufOffset, data, offset, length);
	}
Copy data from another buffer into this buffer.
@param offset offset within this buffer.
@param buf source buffer
@param bufOffset source buffer offset
@param length amount of data to copy.
@throws IndexOutOfBoundsException is thrown if parameters result in
data access beyond the buffer size.
Ghidra/Framework/DB/src/main/java/db/buffers/DataBuffer.java