src/PEAR/ChannelFile.php
function _validateError($code, $params = array())
    {
        $this->_stack->push($code, 'error', $params);
        $this->_isValid = false;
    }
function _validateError($code, $params = array())
    {
        $this->_stack->push($code, 'error', $params);
        $this->_isValid = false;
    }
Validation error.  Also marks the object contents as invalid
@param error code
@param array error information
@access private