lib/classes/Swift/Mime/SimpleHeaderSet.php
public function setCharset($charset)
    {
        $this->charset = $charset;
        $this->factory->charsetChanged($charset);
        $this->notifyHeadersOfCharset($charset);
    }
public function setCharset($charset)
    {
        $this->charset = $charset;
        $this->factory->charsetChanged($charset);
        $this->notifyHeadersOfCharset($charset);
    }
public function setCharset ( $ charset ) { $ this -> charset = $ charset ; $ this -> factory -> charsetChanged ( $ charset ) ; $ this -> notifyHeadersOfCharset ( $ charset ) ; }
Set the charset used by these headers.

@param string $charset
Set the charset used by these headers .