Function getExpression

test/fixtures/snapshot/typescript.js:159707–159717

* Gets an expression of valid extraction type from a valid statement or expression.

(node)

             * Gets an expression of valid extraction type from a valid statement or expression.
             */
            function getExpression(node) {
                if (isValidExpression(node)) {
                    return node;
                }
                if (ts.isVariableStatement(node)) {
                    var variable = ts.getSingleVariableOfVariableStatement(node);
                    var initializer = variable === null || variable === void 0 ? void 0 : variable.initializer;
                    return initializer && isValidExpression(initializer) ? initializer : undefined;
                }
                return node.expression && isValidExpression(node.expression) ? node.expression : undefined;
            }
            /**
             * Gets a property access expression which may be nested inside of a binary expression. The final
             * expression in an && chain will occur as the right child of the parent binary expression, unless