remix-analyzer/src/solidity-analyzer/modules/staticAnalysisCommon.js
function isBlockBlockHashAccess (node) {
  return isSpecialVariableAccess(node, specialVariables.BLOCKHASH) || isBuiltinFunctionCall(node) && getLocalCallName(node) === 'blockhash'
}
function isBlockBlockHashAccess (node) {
  return isSpecialVariableAccess(node, specialVariables.BLOCKHASH) || isBuiltinFunctionCall(node) && getLocalCallName(node) === 'blockhash'
}
function isBlockBlockHashAccess ( node ) { return isSpecialVariableAccess ( node , specialVariables . BLOCKHASH ) || isBuiltinFunctionCall ( node ) && getLocalCallName ( node ) === 'blockhash' }
True if access to block.blockhash
@node {ASTNode} some AstNode
@return {bool}
True if access to block . blockhash