check if this uri is a data url starting with `` data : '' concode_field_sep CSSSourceLocation m_aSourceLocation concode_elem_sep String m_sURI concode_field_sep int hashCode concode_elem_sep CSSSourceLocation getSourceLocation concode_elem_sep boolean equals concode_elem_sep CSSURI setURI concode_elem_sep String getAsCSSString concode_elem_sep void setSourceLocation concode_elem_sep String toString concode_elem_sep CSSDataURL getAsDataURL concode_elem_sep String getURI
boolean function ( ) { return CSSDataURLHelper . isDataURL ( m_sURI ) ; }