how to clear content in field of RumbaTextField

hello everyone,

I am using Rumba also an terminal.

this is my command

desktop.<RumbaTextField>find("/WPFWindow[@caption='Terminal - Micro Focus Rumba']//FormsHost//RumbaScreen//RumbaTextField[@priorlabel='Part']").sendKeys("6151000");

though I need to clear the content before I sendKeys("6151000");

I tried with 

desktop.<RumbaTextField>find("/WPFWindow[@caption='Terminal - Micro Focus Rumba']//FormsHost//RumbaScreen//RumbaTextField[@priorlabel='Part']").clear();

(above try it's not not a method).

what method is possible to use?

I have checked in the list

I know i could hard-code it like backspace + del buttons but it feels not right to do that its need to be a method similar to clear?

Thank you in advance