Loads class content from a string and inserts it into the given loaded class. The existing class must be a long class definition, either normal or class extends. The content is merged according to the following rules:
Any section not merged is added after the last section of the same type, or where they would normally be placed if no such section exists (i.e. public/protected first, then equations, etc).
Example:
loadClassContentString(" Real y; equation y = x; ", P.M);
function loadClassContentString input String data; input TypeName className; output Boolean success; end loadClassContentString;