remix-analyzer/src/solidity-analyzer/modules/staticAnalysisCommon.js
function isLLDelegatecall (node) {
  return isMemberAccess(node,
          exactMatch(util.escapeRegExp(lowLevelCallTypes.DELEGATECALL.type)),
          undefined, exactMatch(basicTypes.ADDRESS), exactMatch(lowLevelCallTypes.DELEGATECALL.ident))
}
function isLLDelegatecall (node) {
  return isMemberAccess(node,
          exactMatch(util.escapeRegExp(lowLevelCallTypes.DELEGATECALL.type)),
          undefined, exactMatch(basicTypes.ADDRESS), exactMatch(lowLevelCallTypes.DELEGATECALL.ident))
}
function isLLDelegatecall ( node ) { return isMemberAccess ( node , exactMatch ( util . escapeRegExp ( lowLevelCallTypes . DELEGATECALL . type ) ) , undefined , exactMatch ( basicTypes . ADDRESS ) , exactMatch ( lowLevelCallTypes . DELEGATECALL . ident ) ) }
True if low level delegatecall
@node {ASTNode} some AstNode
@return {bool}
True if low level delegatecall