Function isNarrowableReference

test/fixtures/snapshot/typescript.js:45361–45367

(expr)

            return false;
        }
        function isNarrowableReference(expr) {
            return ts.isDottedName(expr)
                || (ts.isPropertyAccessExpression(expr) || ts.isNonNullExpression(expr) || ts.isParenthesizedExpression(expr)) && isNarrowableReference(expr.expression)
                || ts.isBinaryExpression(expr) && expr.operatorToken.kind === 27 /* SyntaxKind.CommaToken */ && isNarrowableReference(expr.right)
                || ts.isElementAccessExpression(expr) && (ts.isStringOrNumericLiteralLike(expr.argumentExpression) || ts.isEntityNameExpression(expr.argumentExpression)) && isNarrowableReference(expr.expression)
                || ts.isAssignmentExpression(expr) && isNarrowableReference(expr.left);
        }
        function containsNarrowableReference(expr) {
            return isNarrowableReference(expr) || ts.isOptionalChain(expr) && containsNarrowableReference(expr.expression);
        }