Instead of language specific syntax, here Shell Scripting, Shellman focuses on programming concepts. These concepts are grouped under namespaces. For example string namespace to name a few contains:
to activate desired snippet you need to type string and select desired snippet from listed snippets i.e. string reverse. Using TAB key fill needed info and you are done.
Sometimes doing a job takes more than a snippet. Shellman has ready to use functions to put into your code if you type fn, and selected function usage is available after typing fx. For example the function to create a banner with desired text can be accessed via fn banner simple and to call this function the snippet is fx banner simple. Pass required parameters and a banner with your text would be printed.