| ItemInt32 | Gets or sets the property at the specified index. | 
| ItemReadOnlySpanChar | Gets the value of a property by name. Using a nonexistent propertyName returns Undefined, just like in JavaScript. | 
| ItemString | Gets or sets the value of a property by name. When the indexer is read, using a nonexistent propertyName returns Undefined, just like in JavaScript. | 
| ItemStringSegment | Gets the value of a property by name. Using a nonexistent propertyName returns Undefined, just like in JavaScript. |