Function isValidUnusedLocalDeclaration

test/fixtures/snapshot/typescript.js:82097–82110

(declaration)

            return ts.tryCast(ts.getRootDeclaration(node), ts.isParameter);
        }
        function isValidUnusedLocalDeclaration(declaration) {
            if (ts.isBindingElement(declaration)) {
                if (ts.isObjectBindingPattern(declaration.parent)) {
                    /**
                     * ignore starts with underscore names _
                     * const { a: _a } = { a: 1 }
                     */
                    return !!(declaration.propertyName && isIdentifierThatStartsWithUnderscore(declaration.name));
                }
                return isIdentifierThatStartsWithUnderscore(declaration.name);
            }
            return ts.isAmbientModule(declaration) ||
                (ts.isVariableDeclaration(declaration) && ts.isForInOrOfStatement(declaration.parent.parent) || isImportedDeclaration(declaration)) && isIdentifierThatStartsWithUnderscore(declaration.name);
        }
        function checkUnusedLocalsAndParameters(nodeWithLocals, addDiagnostic) {
            // Ideally we could use the ImportClause directly as a key, but must wait until we have full ES6 maps. So must store key along with value.
            var unusedImports = new ts.Map();