default ExpressionMatcher<MinusExpression> neg(ExpressionMatcher<?> unary) {
			return new UnaryExpressionMatcher<>(MinusExpression.class, unary);
		}
Match the form {@code -U}

@param unary the child matcher
@return the matcher
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/expr/match/ExpressionMatcher.java