| string-snip% : class? | 
superclass: snip%  | 
An instance of string-snip% is created automatically when
 text is inserted into a text editor. See also on-new-string-snip in text%.
| (make-object string-snip% [allocsize]) → (is-a?/c string-snip%) | 
| allocsize : exact-nonnegative-integer? = 0 | 
| (make-object string-snip% s) → (is-a?/c string-snip%) | 
| s : string? | 
Creates a string snip whose initial content is s, if
 supplied, empty otherwise. In the latter case, the optional
 allocsize argument is a hint about how much storage space
 for text should be initially allocated by the snip.
| (send a-string-snip insert s len [pos]) → void? | 
| s : string? | 
| len : exact-nonnegative-integer? | 
| pos : exact-nonnegative-integer? = 0 | 
| (send a-string-snip read len f) → void? | 
| len : exact-nonnegative-integer? | 
| f : (is-a?/c editor-stream-in%) | 
Reads the snip’s data from the given stream.
The len argument specifies the maximum length of the text to
 be read.  (When a text snip is written to a file, the very first
 field is the length of the text contained in the snip.)  This method
 is usually invoked by the text snip class’s read
 method.