private IfStmt doIf(RVal cond, Runnable body) {
		return new IfStmt(this, cond, new BlockStmt(this, body));
	}
Generate an "else if" clause for the wrapped "if" statement

<p>
This is shorthand for {@code _else(_if(...))} but avoids the unnecessary nesting of
parentheses.

@param cond the condition
@param body the body of the clause
@return a wrapper to the second "if" statement
Ghidra/Features/SystemEmulation/src/main/java/ghidra/pcode/struct/StructuredSleigh.java