protected void _while(RVal cond, Runnable body) {
		new WhileStmt(this, cond, new BlockStmt(this, body));
	}
Generate a "while" statement

<p>
The body is usually a lambda containing the controlled statements, so that it resembles Java
/ C syntax:

<pre>
Var temp = local("temp", "/int");
_while(temp.ltiu(10), () -> {
	temp.inc();
});
</pre>

@param cond the condition
@param body the body of the loop
Ghidra/Features/SystemEmulation/src/main/java/ghidra/pcode/struct/StructuredSleigh.java