getParameterAssignment function
Implementation
String getParameterAssignment(ClassElement clazz, ParameterElement parameter) {
var session = parameter.session!;
ParsedLibraryResult parsedLibResult =
session.getParsedLibraryByElement(clazz.library) as ParsedLibraryResult;
ElementDeclarationResult declaration =
parsedLibResult.getElementDeclaration(parameter)!;
return declaration.node.toSource().split("=").last;
}