public void visitCallStaticExpr(final CallStaticExpr expr) {

		final Expr[] params = expr.params();
		for (int i = 0; i < params.length; i++) {
			if (params[i] == previous) {
				if (i > 0) {
					check(params[i - 1]);
				} else {
					previous = expr;
					expr.parent().visit(this);
				}
				break;
			}
		}

	}