{{tag>Programmers_Reference Methods IFunctionLibrary_Interface}}
======hasFunction (String, int)======

**Interface:** [[3500:0500:0510|IFunctionLibrary]]
<code java>public boolean hasFunction (String functionName, int paramNmb)</code>

This method must return true if the library contains the function with the specified name and number of parameters. //**AwareIM**// will call this method to find the library responsible for the calculation of a particular function referenced in a rule.

=====Parameters=====
|''functionName''|the name of the function|
|''paramNmb''|the number of function parameters|

=====Returns=====
True if the function with the specified name and number of parameters is supported by the library, false otherwise.