{{tag>Programmers_Reference Methods IFunctionLibrary_Interface hasFunction Index}}
====hasFunction (String, int)====
<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. //**Aware IM**// 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.