The User's Guide follows the following convension to show the usage of a function in a bounding box.
This example shows that a function called 'loadFile' takes one parameter of String type.
When a function is overloaded, the possible signatures are connected with the word ' or '.
When a function has an optional parameter, a pair of curly brace { } is used to indicate that it can be specified optionally.
When a parameter is an Object or an array type, the component type may be omitted.
When a parameter is a function, the parameter list surrounded by parenthesis follows.