| baseString | The base string. | 
Constructs a StringView over an entire string.
| baseString | The base string. | 
| startIndex | The starting index of the view. | 
Constructs a StringView from a string, starting at index startIndex.
| baseString | The base string. | 
| startIndex | The starting index of the view. | 
| endIndex | The exclusive ending index of the view. | 
Constructs a StringView from a string, starting at index startIndex and ending at, but not including, index endIndex.