fetchIdentifier.ts

// Fetch identifier for given node in AST if existing.
export const fetchIdentifier = (node: ts.Node): string | null => {
    if (!ts.isPropertyDeclaration(node) && !ts.isVariableDeclaration(node) && !ts.isExpressionStatement(node)) {
        return fetchIdentifier(node.parent);
    } else if (ts.isPropertyDeclaration(node) || ts.isVariableDeclaration(node)) {
        return node.name.getText();
    } else {
        return null;
    }
};