question: get the x509certificate used for signing concode_field_sep String digestMethod concode_elem_sep Document documentToBeSigned concode_elem_sep String signatureMethod concode_elem_sep KeyPair keyPair concode_elem_sep String referenceURI concode_elem_sep Node nextSibling concode_elem_sep X509Certificate x509Certificate concode_field_sep Document getDocumentToBeSigned concode_elem_sep void setDocumentToBeSigned concode_elem_sep Node getNextSibling concode_elem_sep void setReferenceURI concode_elem_sep String getReferenceURI concode_elem_sep void setX509Certificate concode_elem_sep void setNextSibling concode_elem_sep String getDigestMethod concode_elem_sep String getSignatureMethod concode_elem_sep KeyPair getKeyPair concode_elem_sep void setKeyPair concode_elem_sep void setDigestMethod concode_elem_sep void setSignatureMethod
target: X509Certificate function ( ) { return x509Certificate ; }