code: public ASTMethod getMethod(ExecutableElement executableElement) {
  
          ImmutableList<ASTParameter> parameters = getParameters(executableElement.getParameters());
          ASTAccessModifier modifier = buildAccessModifier(executableElement);
          ImmutableSet<ASTType> throwsTypes = buildASTElementTypes(executableElement.getThrownTypes());
  
          return new ASTElementMethod(executableElement, astTypeBuilderVisitor, parameters, modifier, getAnnotations(executableElement), throwsTypes);
      }
docs: Build an ASTMethod from the provided ExecutableElement
  
  @param executableElement required input element
  @return ASTMethod