escapeHtml4
Description: This function prepares the Subject to be inserted into HTML document by escaping the characters in a String using the HTML entities. Supports all known HTML 4.0 entities.
Subject Type: String
Arguments: No arguments
Return Type: String
Examples: If the "message" attribute is '"bread" & "butter"', then the Expression ${message:escapeHtml4()}
will return '"bread" & "butter"'