public byte[] assemble(Address at, String line, AssemblyPatternBlock ctx)
			throws AssemblySyntaxException, AssemblySemanticException, IOException {
		byte[] full = baos.toByteArray();
		byte[] bytes = asm.assembleLine(at, line, ctx);
		System.arraycopy(bytes, 0, full, (int) at.subtract(entry), bytes.length);
		baos.reset();
		baos.write(full);
		return bytes;
	}
Assemble a line and patch into the buffer

<p>
This will not grow the buffer, so the instruction being patched must already exist in the
buffer. The typical use case is to fix up a reference:

<pre>
AssemblyBuffer buf = new AssemblyBuffer(asm, entry);
// ...
Address jumpCheck = buf.getNext();
buf.assemble("JMP 0x" + buf.getNext()); // Template must accommodate expected jump distance
// ...
Address labelCheck = buf.getNext();
buf.assemble(jumpCheck, "JMP 0x" + labelCheck);
buf.assemble("CMP ECX, 0");
// ...
</pre>

<p>
This does not check that the patched instruction matches length with the new instruction. In
fact, the buffer does not remember instruction boundaries at all. If verification is needed,
the caller should check the lengths of the returned byte arrays for the template and the
patch.

@param at the address of the instruction to patch
@param line the line
@param ctx the assembly context
@return the resulting bytes for the assembled instruction
@throws AssemblySyntaxException if the instruction cannot be parsed
@throws AssemblySemanticException if the instruction cannot be encoded
@throws IOException if the buffer cannot be written
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/AssemblyBuffer.java